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imagecolorresolve

Get the index of the specified color or its closest possible alternative (PHP 4, PHP 5)
int imagecolorresolve ( resource image, int red, int green, int blue )

This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.

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.

Parameters

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

Return Values

Returns a color index.