Colors darker than

Tree · 08-31-2006, 04:53 PM

Is there a way in PHP to randomly select all colors darker than, say, #696969?

I have a randomColor function already:

PHP Code:

  function randomColor()

{

    return str_pad(dechex(mt_rand(0, 16777215)), 6, '0', STR_PAD_LEFT);

}

I just don't know where #696969 stops in base 10.
????: NamePros.com http://www.namepros.com/programming/233606-colors-darker-than.html

iNod · 08-31-2006, 09:51 PM

Something like this maybe?

PHP Code:

  function darker_color($color, $dif=20){

$color = str_replace('#', '', $color);

if (strlen($color) != 6){ return '000000'; }

$rgb = '';

for ($x=0;$x<3;$x++){

$c = hexdec(substr($color,(2*$x),2)) - $dif;

????: NamePros.com http://www.namepros.com/showthread.php?t=233606
$c = ($c < 0) ? 0 : dechex($c);

$rgb .= (strlen($c) < 2) ? '0'.$c : $c;

}

return '#'.$rgb;

}

Than use something like

PHP Code:

  for ($x=1; $x < 20; $x++){

// Start color:

$c = darker_color('#FF481D', ($x*3));

????: NamePros.com http://www.namepros.com/showthread.php?t=233606
 
print "<div style='background-color: $c; color: $c; font-size: 50%; padding: 0px;'>.</div>\n";

}

To print it.. Where as the number of required darker amounts is 20..

Or what ever you need..

- Steve

08-31-2006, 04:53 PM	THREAD STARTER #1 (permalink)
Tree NamePros Regular Join Date: Feb 2006 Location: Atlanta, GA, USA Posts: 335	Colors darker than Is there a way in PHP to randomly select all colors darker than, say, #696969? I have a randomColor function already: PHP Code: `function randomColor() { return str_pad(dechex(mt_rand(0, 16777215)), 6, '0', STR_PAD_LEFT); }` I just don't know where #696969 stops in base 10. ????: NamePros.com http://www.namepros.com/programming/233606-colors-darker-than.html

08-31-2006, 09:51 PM	#2 (permalink)
iNod Eating Pie Join Date: Nov 2004 Location: Canada Posts: 2,267	Something like this maybe? PHP Code: `function darker_color($color, $dif=20){ $color = str_replace('#', '', $color); if (strlen($color) != 6){ return '000000'; } $rgb = ''; for ($x=0;$x<3;$x++){ $c = hexdec(substr($color,(2$x),2)) - $dif; ????: NamePros.com http://www.namepros.com/showthread.php?t=233606 $c = ($c < 0) ? 0 : dechex($c); $rgb .= (strlen($c) < 2) ? '0'.$c : $c; } return '#'.$rgb; }` Than use something like PHP Code: `for ($x=1; $x < 20; $x++){ // Start color: $c = darker_color('#FF481D', ($x3)); ????: NamePros.com http://www.namepros.com/showthread.php?t=233606 print "<div style='background-color: $c; color: $c; font-size: 50%; padding: 0px;'>.</div>\n"; }` To print it.. Where as the number of required darker amounts is 20.. Or what ever you need.. - Steve __________________ I feel old. Last edited by iNod; 08-31-2006 at 09:56 PM.

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