colors - How do I make a lighter version of a colour using PHP? -

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hello fellow earthlings. quesion rgb color , usefulness in simple tiny php code:

imagine have variable $colora containning valid 6 char color. b1b100, greenish natural color. if make new color that, is, say, ten steps lighter thatn original color, roughly.

$colora = b1b100 // original color php code little color engine lightening stuff goes here $colorb = ?????? // original color lightened

is there php ready function knows rgb colors like

php function rgb ( input color, do, output color) +/- 255 values of brightness etc etc.

is possible or day dreaming?

rgb-hsl($colora, +10, $colorb);

if not exist, shortest code doing this? suggestions, code or ideas answers me. thanks.

this question has full-blown php script can convert rgb hsl colour, , increase h component of hsl colour - should trivial change increase l instead.


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