Random Hex Color
Technique #1
<?php
$rand = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f');
$color = '#'.$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)].$rand[rand(0,15)];
?>Then echo out the $color value anywhere you need it. For example:
<body style="background: <?php echo $color; ?>;">Technique #2
<?php printf( "#%06X\n", mt_rand( 0, 0xFFFFFF )); ?>There is also a JavaScript version.
Simpler version:
<php $color = sprintf(“#%06x”,rand(0,16777215)); ?>
<body style="background: <php echo $color; ?>;”>
Thanks, I like your better. Simple.
Interestingly enough, I had to do this exact task just a few days ago. Here’s what I came up with:
$color = str_pad(dechex(rand(0,16777215),6, "0", STR_PAD_LEFT);In technique #1 you can tweak with the code to get Red, Green and Blue shades out of the code. The all you have to play with is the value upto 15.
Can I randomize hex colours from a preset list of colour hexes? If so then how?
yes you can with #1, but your preset list must have some common number such as #axbxcx or #aabbxx
for the solution #1, you can actually contorl the random color where #2 cannot
How about this one?
$rand = dechex(rand(0x000000, 0xFFFFFF));
echo('#' . $rand);
You can change rand in for mt_rand if you want, and you can put strtoupper() around the dechex to make the random number look nicer (although it’s not required). That would look like
$rand = strtoupper(dechex(rand(0x000000, 0xFFFFFF)));It works perfectly and is way simpler than all the other methods described here :)