?>
<h1>Color palette manipulation and color finding</h1>
<p>
Let's take all named colors, build tetradic complements for them and filter out the coolest values
of a specific hue range.
<br>
<br>
<a href="?hue=red">Red</a> | <a href="?hue=yellow">Yellow</a> | <a href="?hue=blue">Blue</a>
| <a href="?hue=cyan">Cyan</a> | <a href="?hue=green">Green</a> | <a href="?hue=magenta">Magenta</a>
</p>
<?php
$palette = new SimplePalette();
foreach ($colorNames as $color) {
$palette = $palette->add(new TetradicScheme($color));
}
$filtered = Palette::filterByHueRange($palette, $hueRange);
$deduplicated = Palette::filterSimilarColors($filtered, 15);
?>
<table width="100%">
<tr>
<th>All</th>
<th>Only <strong><?php
echo $hueRange;
?>
</strong> colors</th>
<th>Without duplicates (Tolerance: 15, meaning that they have a color difference of at least 15)</th>
</tr>
<tr>
<td valign="top" align="center"><?php
echo Palette::getHtml($palette, 4);
?>
function color_palette_filter_by_hue_range(PaletteInterface $palette, $hueRange)
{
return Palette::filterByHueRange($palette, $hueRange);
}
