Get Color Shade with PHP

I want to get brighter hex colour shade output from a given hex value with PHP. For example, I give the colour #cc6699 as input, and I want #ee88aa as the output colour. How would I go about 开发者_运维百科doing this in PHP?

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You need to convert the color to RGB, make the additions, and convert back:

// Convert string to 3 decimal values (0-255)
$rgb = array_map('hexdec', str_split("cc6699", 2));

// Modify color
$rgb[0] += 34;
$rgb[1] += 34;
$rgb[2] += 17;

// Convert back
$result = implode('', array_map('dechex', $rgb));

echo $result;

See it in action here.

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1. split the color in three elements: cc, 66, 99 2. Convert it to decimal with http://php.net/manual/de/function.hexdec.php 3. Increment three decimal values 4. Convert decimal to hex again 5. put the three elements together

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Not directly related to your question, but this article is interesting for color transformation : http://beesbuzz.biz/code/hsv_color_transforms.php

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The best solution is to convert the RGB to HSL or HSV (just search google for php converter hsl/hsv).

Then you can play with the 'lightness' or 'value' values of the colorspace.

Afterwards convert it back to RGB colorspace.