RGBAColor

This utility class is used to hold information on an RGB based color, with optional opacity / alpha channel.

Overview

Supported color value ranges

• 8-Bit integer: 0-255 (Standard color values)
• 7-Bit integer: 0-127 (PHP GD style alpha channel)
• Float: 0.00-1.00 (CSS opacity)
• Percent: 0-100 (General purpose)

Color components

• Red
• Green
• Blue
• Opacity
• Transparency (inverted opacity)

Usage examples

use AppUtils;

$color = new RGBColor

Comparing colors

Ignoring the opacity

The match() method compares two colors, ignoring the opacity.

use AppUtils;

$colorA = ColorFactory::createFromHEX('CCC');
$colorB = ColorFactory::createFromHEX('CCC');

if($colorA->matches($colorB))
{
    echo 'Colors match.';
}
else
{
    echo 'Colors do not match.';
}

Output:

Colors match.

With opacity

The matchAlpha() method compares two colors, including their opacity.

use AppUtils;

$colorA = ColorFactory::createFromHEX('CCCCCCDD');
$colorB = ColorFactory::createFromHEX('CCCCCCEE');

if($colorA->matchesAlpha($colorB))
{
    echo 'Colors match.';
}
else
{
    echo 'Colors do not match.';
}

Output:

Colors do not match.