(PHP 4, PHP 5)
imagecolorclosest — Get the index of the closest color to the specified color
( resource $image
, int $red
, int $green
, int $blue
The "distance" between the desired color and each color in the
palette is calculated as if the RGB values
represented points in three-dimensional space.
If you created the image from a file, only colors used in the image are
resolved. Colors present only in the pallete are not resolved.
An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
Value of red component.
Value of green component.
Value of blue component.
The colors parameters are integers between 0 and 255 or hexadecimals
between 0x00 and 0xFF.
Returns the index of the closest color, in the palette of the image, to
the specified one