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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Wt: Wt::WColor Class Reference</title>
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<div class="navpath"><a class="el" href="namespaceWt.html">Wt</a>::<a class="el" href="classWt_1_1WColor.html">WColor</a>
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<div class="contents">
<h1>Wt::WColor Class Reference<br>
<small>
[<a class="el" href="group__style.html">Style classes</a>, <a class="el" href="group__painting.html">Painting system</a>]</small>
</h1><!-- doxytag: class="Wt::WColor" -->A class that specifies a color.
<a href="#_details">More...</a>
<p>
<code>#include <Wt/WColor></code>
<p>
<p>
<a href="classWt_1_1WColor-members.html">List of all members.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#0aca175990842e4be3d944236e27cda3">WColor</a> ()</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a default color. <a href="#0aca175990842e4be3d944236e27cda3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#5e0102afbdf3ece70a200c1379ad3522">WColor</a> (int red, int green, int blue, int alpha=255)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a color with given red/green/blue/alpha components. <a href="#5e0102afbdf3ece70a200c1379ad3522"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#00336e4511fb1fd68f3c66d58c30a4c1">WColor</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a color from a CSS name. <a href="#00336e4511fb1fd68f3c66d58c30a4c1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#12eeb92c9177d1033e2dbd72e799ddcc">WColor</a> (<a class="el" href="group__style.html#g9686ea88ce4db2c0a12ea84452f60133">GlobalColor</a> name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Creates a predefined color. <a href="#12eeb92c9177d1033e2dbd72e799ddcc"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772">setRgb</a> (int red, int green, int blue, int alpha=255)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets the red/green/blue/alpha components. <a href="#b3e459365133f983d702a310dd600772"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#ea520f8d33c730809176bd555463e33a">setName</a> (const <a class="el" href="classWt_1_1WString.html">WString</a> &name)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets the CSS name. <a href="#ea520f8d33c730809176bd555463e33a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#1aa64740fc2dcfd7b30dfddfe2de8000">isDefault</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns if the color is the default color. <a href="#1aa64740fc2dcfd7b30dfddfe2de8000"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#1f176a8557b9ebe2a9260b49acae3c3e">red</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the red component. <a href="#1f176a8557b9ebe2a9260b49acae3c3e"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#c4fa50432b68fd0f1134e80cda0754c5">green</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the green component. <a href="#c4fa50432b68fd0f1134e80cda0754c5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#1126ef11c5211e2b0ec29020ea930f36">blue</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the blue component. <a href="#1126ef11c5211e2b0ec29020ea930f36"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#7fe483df7025fbb2bcb13764bffd9fd1">alpha</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the alpha component. <a href="#7fe483df7025fbb2bcb13764bffd9fd1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#4812291da745a35b8e505848c27bedcd">name</a> () const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the CSS name. <a href="#4812291da745a35b8e505848c27bedcd"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#d26120c40c96c29c58a22cae5a92d0a5">operator==</a> (const <a class="el" href="classWt_1_1WColor.html">WColor</a> &other) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#d26120c40c96c29c58a22cae5a92d0a5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classWt_1_1WColor.html#9e457a4ece07294a1eb16fc6dbc22d95">operator!=</a> (const <a class="el" href="classWt_1_1WColor.html">WColor</a> &other) const </td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Comparison operator. <a href="#9e457a4ece07294a1eb16fc6dbc22d95"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A class that specifies a color.
<p>
A color corresponds to a CSS color. You can specify a color either using its red/green/blue components, or from a valid CSS name.<p>
The color supports an alpha channel, which determines the degree of transparency. An alpha value of 0 is completely transparent (and thus invisible), while a value of 255 is completely opaque. <hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="0aca175990842e4be3d944236e27cda3"></a><!-- doxytag: member="Wt::WColor::WColor" ref="0aca175990842e4be3d944236e27cda3" args="()" -->
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<td class="memname">Wt::WColor::WColor </td>
<td>(</td>
<td class="paramname"> </td>
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<div class="memdoc">
<p>
Creates a default color.
<p>
The default color is depending on the context, another color (for example from a hierarchical parent in a widget tree), or a completely transparent color.
</div>
</div><p>
<a class="anchor" name="5e0102afbdf3ece70a200c1379ad3522"></a><!-- doxytag: member="Wt::WColor::WColor" ref="5e0102afbdf3ece70a200c1379ad3522" args="(int red, int green, int blue, int alpha=255)" -->
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<td class="memname">Wt::WColor::WColor </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>red</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>green</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>blue</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>alpha</em> = <code>255</code></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>
Creates a color with given red/green/blue/alpha components.
<p>
All four components must be specified with a value in the range (0 - 255). The alpha channel determines the degree of transparency. An alpha value of 0 is completely transparent (and thus invisible), while a value of 255 is completely opaque.<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772" title="Sets the red/green/blue/alpha components.">setRgb(int, int, int, int)</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="00336e4511fb1fd68f3c66d58c30a4c1"></a><!-- doxytag: member="Wt::WColor::WColor" ref="00336e4511fb1fd68f3c66d58c30a4c1" args="(const WString &name)" -->
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<td class="memname">Wt::WColor::WColor </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>
Creates a color from a CSS name.
<p>
The <code>name</code> may be any valid CSS color name, including names colors such as "aqua", or colors defined as RGB components.<p>
In either case, the result of the methods <a class="el" href="classWt_1_1WColor.html#1f176a8557b9ebe2a9260b49acae3c3e" title="Returns the red component.">red()</a>, <a class="el" href="classWt_1_1WColor.html#c4fa50432b68fd0f1134e80cda0754c5" title="Returns the green component.">green()</a> and <a class="el" href="classWt_1_1WColor.html#1126ef11c5211e2b0ec29020ea930f36" title="Returns the blue component.">blue()</a> is undefined.<p>
See also <a href="http://www.w3.org/TR/REC-CSS2/syndata.html#value-def-color">http://www.w3.org/TR/REC-CSS2/syndata.html#value-def-color</a>
</div>
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<a class="anchor" name="12eeb92c9177d1033e2dbd72e799ddcc"></a><!-- doxytag: member="Wt::WColor::WColor" ref="12eeb92c9177d1033e2dbd72e799ddcc" args="(GlobalColor name)" -->
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<td class="memname">Wt::WColor::WColor </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group__style.html#g9686ea88ce4db2c0a12ea84452f60133">Wt::GlobalColor</a> </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>
Creates a predefined color.
<p>
Constructs one of the 16 predefined Wt colors constants.
</div>
</div><p>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="b3e459365133f983d702a310dd600772"></a><!-- doxytag: member="Wt::WColor::setRgb" ref="b3e459365133f983d702a310dd600772" args="(int red, int green, int blue, int alpha=255)" -->
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<td class="memname">void Wt::WColor::setRgb </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"> <em>red</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>green</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>blue</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>alpha</em> = <code>255</code></td><td> </td>
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<td>)</td>
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<p>
Sets the red/green/blue/alpha components.
<p>
All four components must be specified with a value in the range (0 - 255). The alpha channel determines the degree of transparency. An alpha value of 0 is completely transparent (and thus invisible), while a value of 255 is completely opaque.
</div>
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<a class="anchor" name="ea520f8d33c730809176bd555463e33a"></a><!-- doxytag: member="Wt::WColor::setName" ref="ea520f8d33c730809176bd555463e33a" args="(const WString &name)" -->
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<td class="memname">void Wt::WColor::setName </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="classWt_1_1WString.html">WString</a> & </td>
<td class="paramname"> <em>name</em> </td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>
Sets the CSS name.
<p>
The <code>name</code> may be any valid CSS color name, including names colors such as "aqua", or colors defined as RGB components.<p>
In either case, the result of the methods <a class="el" href="classWt_1_1WColor.html#1f176a8557b9ebe2a9260b49acae3c3e" title="Returns the red component.">red()</a>, <a class="el" href="classWt_1_1WColor.html#c4fa50432b68fd0f1134e80cda0754c5" title="Returns the green component.">green()</a> and <a class="el" href="classWt_1_1WColor.html#1126ef11c5211e2b0ec29020ea930f36" title="Returns the blue component.">blue()</a> is undefined.<p>
See also <a href="http://www.w3.org/TR/REC-CSS2/syndata.html#value-def-color">http://www.w3.org/TR/REC-CSS2/syndata.html#value-def-color</a>
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<a class="anchor" name="1aa64740fc2dcfd7b30dfddfe2de8000"></a><!-- doxytag: member="Wt::WColor::isDefault" ref="1aa64740fc2dcfd7b30dfddfe2de8000" args="() const " -->
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<td class="memname">bool Wt::WColor::isDefault </td>
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<td> const<code> [inline]</code></td>
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<p>
Returns if the color is the default color.
<p>
<dl class="see" compact><dt><b>See also:</b></dt><dd><a class="el" href="classWt_1_1WColor.html#0aca175990842e4be3d944236e27cda3" title="Creates a default color.">WColor()</a> </dd></dl>
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<a class="anchor" name="1f176a8557b9ebe2a9260b49acae3c3e"></a><!-- doxytag: member="Wt::WColor::red" ref="1f176a8557b9ebe2a9260b49acae3c3e" args="() const " -->
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<td class="memname">int Wt::WColor::red </td>
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<td> const<code> [inline]</code></td>
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<p>
Returns the red component.
<p>
Only available when the color was specified in terms of the RGB components using <a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772" title="Sets the red/green/blue/alpha components.">setRgb(int, int, int, int)</a> or <a class="el" href="classWt_1_1WColor.html" title="A class that specifies a color.">WColor</a>(int, int, int, int).
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<a class="anchor" name="c4fa50432b68fd0f1134e80cda0754c5"></a><!-- doxytag: member="Wt::WColor::green" ref="c4fa50432b68fd0f1134e80cda0754c5" args="() const " -->
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<td class="memname">int Wt::WColor::green </td>
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<td> const<code> [inline]</code></td>
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<p>
Returns the green component.
<p>
Only available when the color was specified in terms of the RGB components using <a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772" title="Sets the red/green/blue/alpha components.">setRgb(int, int, int, int)</a> or <a class="el" href="classWt_1_1WColor.html" title="A class that specifies a color.">WColor</a>(int, int, int, int).
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<a class="anchor" name="1126ef11c5211e2b0ec29020ea930f36"></a><!-- doxytag: member="Wt::WColor::blue" ref="1126ef11c5211e2b0ec29020ea930f36" args="() const " -->
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<td class="memname">int Wt::WColor::blue </td>
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Returns the blue component.
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Only available when the color was specified in terms of the RGB components using <a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772" title="Sets the red/green/blue/alpha components.">setRgb(int, int, int, int)</a> or <a class="el" href="classWt_1_1WColor.html" title="A class that specifies a color.">WColor</a>(int, int, int, int).
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<a class="anchor" name="7fe483df7025fbb2bcb13764bffd9fd1"></a><!-- doxytag: member="Wt::WColor::alpha" ref="7fe483df7025fbb2bcb13764bffd9fd1" args="() const " -->
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<td class="memname">int Wt::WColor::alpha </td>
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Returns the alpha component.
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Only available when the color was specified in terms of the RGB components using <a class="el" href="classWt_1_1WColor.html#b3e459365133f983d702a310dd600772" title="Sets the red/green/blue/alpha components.">setRgb(int, int, int, int)</a> or <a class="el" href="classWt_1_1WColor.html" title="A class that specifies a color.">WColor</a>(int, int, int, int).
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<a class="anchor" name="4812291da745a35b8e505848c27bedcd"></a><!-- doxytag: member="Wt::WColor::name" ref="4812291da745a35b8e505848c27bedcd" args="() const " -->
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<td class="memname">const <a class="el" href="classWt_1_1WString.html">WString</a>& Wt::WColor::name </td>
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Returns the CSS name.
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Only available when it was set with <a class="el" href="classWt_1_1WColor.html#ea520f8d33c730809176bd555463e33a" title="Sets the CSS name.">setName(const WString&)</a> or <a class="el" href="classWt_1_1WColor.html#00336e4511fb1fd68f3c66d58c30a4c1" title="Creates a color from a CSS name.">WColor(const WString& name)</a>.
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<a class="anchor" name="d26120c40c96c29c58a22cae5a92d0a5"></a><!-- doxytag: member="Wt::WColor::operator==" ref="d26120c40c96c29c58a22cae5a92d0a5" args="(const WColor &other) const " -->
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<td class="memname">bool Wt::WColor::operator== </td>
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Comparison operator.
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Returns <code>true</code> if the two colors were defined in exactly the same way. It may return <code>false</code> although they actually represent the same color.
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<a class="anchor" name="9e457a4ece07294a1eb16fc6dbc22d95"></a><!-- doxytag: member="Wt::WColor::operator!=" ref="9e457a4ece07294a1eb16fc6dbc22d95" args="(const WColor &other) const " -->
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<td class="memname">bool Wt::WColor::operator!= </td>
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<td class="paramtype">const <a class="el" href="classWt_1_1WColor.html">WColor</a> & </td>
<td class="paramname"> <em>other</em> </td>
<td> ) </td>
<td> const</td>
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<p>
Comparison operator.
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Returns false if the two colors were not defined in exactly the same way. It may return return although they actually represent the same color.
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