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?

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.

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

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

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.