(PHP 4 >= 4.0.1, PHP 5, PHP 7)
imagecolorclosesthwb — Get the index of the color which has the hue, white and blackness
imagecolorclosesthwb ( resource $image , int $red , int $green , int $blue ) : int
Get the index of the color which has the hue, white and blackness nearest the given color.
image
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
red
Value of red component.
green
Value of green component.
blue
Value of blue component.
Returns an integer with the index of the color which has the hue, white and blackness nearest the given color.
Example #1 Example of using imagecolorclosesthwb()
<?php $im = imagecreatefromgif('php.gif'); echo 'HWB: ' . imagecolorclosesthwb($im, 116, 115, 152); imagedestroy($im); ?>
The above example will output something similar to:
HWB: 33
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https://www.php.net/manual/en/function.imagecolorclosesthwb.php