272 lines
8.4 KiB
Groff
272 lines
8.4 KiB
Groff
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<title>color() | reference | Processing.js</title>
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<a href="http://processingjs.org/"><img src="../images/header.png" width="177" height="42"></a>
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<span class="tagline">a port of the Processing Visualization Language</span>
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<table cellpadding="0" cellspacing="0" border="0" class="ref-item">
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<tr class="name-row">
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<th scope="row">Name</th>
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<td><h3>color()</h3></td>
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</tr>
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<tr class="">
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<th scope="row">Examples</th>
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<td><div class="example"><img src="color_.gif" alt="example pic" /><pre class="margin">color c1 = color(102, 102, 0);
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fill(c1);
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noStroke();
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rect(30, 20, 55, 55);</pre></div></td>
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</tr>
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<tr class="">
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<th scope="row">Description</th>
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<td>Creates colors for storing in variables of the <b>color</b> datatype. The parameters are interpreted as RGB or HSB values depending on the current <b>colorMode()</b>. The default mode is RGB values from 0 to 255 and therefore, the function call <b>color(255, 204, 0)</b> will return a bright yellow color. The <b>color()</b> function packs the information input through its parameters into a 32 bit number in the following order AAAAAAAARRRRRRRRGGGGGGGGBBBBBBBB where R is the red/hue value, G is green/saturation, and B is blue/brightness.<br /><br />Color can also be created using hexadecimal notation. For example, "color(0, 102, 153)" is equivalent to "color(#006699)" and "color(0x006699)". To create a color with an alpha value using hexadecimal notation, it's necessary to use the "0x" prefix, for example "color(0xCC006699)", which is equivalent to "color(0, 102, 153, 204)". Note the alpha value is first in the hexadecimal notation and last in the RGB notation.</td>
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</tr>
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<tr class="">
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<th scope="row">Syntax</th>
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<td><pre>color(<kbd>gray</kbd>)
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color(<kbd>gray</kbd>, <kbd>alpha</kbd>)
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color(<kbd>value1</kbd>, <kbd>value2</kbd>, <kbd>value3</kbd>)
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color(<kbd>value1</kbd>, <kbd>value2</kbd>, <kbd>value3</kbd>, <kbd>alpha</kbd>)
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color(<kbd>hex</kbd>)
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color(<kbd>hex</kbd>, <kbd>alpha</kbd>)</pre></td>
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</tr>
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<tr class="">
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<th scope="row">Parameters</th>
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<td><table cellpadding="0" cellspacing="0" border="0">
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<tr class="">
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<th scope="row">gray</th>
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<td>int or float: number specifying value between white and black</td>
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</tr>
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<tr class="">
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<th scope="row">alpha</th>
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<td>int or float: relative to current color range</td>
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</tr>
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<tr class="">
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<th scope="row">value1</th>
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<td>int or float: red or hue values relative to the current color range</td>
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</tr>
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<tr class="">
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<th scope="row">value2</th>
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<td>int or float: green or saturation values relative to the current color range</td>
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</tr>
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<tr class="">
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<th scope="row">value3</th>
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<td>int or float: blue or brightness values relative to the current color range</td>
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</tr>
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<tr class="">
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<th scope="row">hex</th>
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<td>int: color value in hexadecimal notation (i.e. #FFCC00 or 0xFFCC00)</td>
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</tr>
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</table></td>
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</tr>
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<tr class="">
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<th scope="row">Usage</th>
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<td>Web & Application</td>
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</tr>
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<tr class="">
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<th scope="row">Related</th>
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<td><a href="http://processingjs.org/reference/color datatype">color datatype</a><br />
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<a href="colorMode_.1">colorMode()</a><br /></td>
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</tr>
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<p>This reference is licensed under the CC BY-NC-SA 2.0 license:</p>
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Processing is an open visualization language developed by
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<a href="http://benfry.com/">Ben Fry</a> & <a href="http://reas.com/">Casey Reas</a>,
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and originally ported to Javascript by
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<a href="http://ejohn.org/blog/processingjs/">John Resig</a>.
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