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# PHP imagecolorresolve - Get the index value of the specified color or the closest alternative value that may be obtained [PHP Image Processing](#) imagecolorresolve — Get the index value of the specified color or the closest alternative value that may be obtained. ### Syntax int imagecolorresolve ( resource $image , int $red , int $green , int $blue ) This function guarantees that a color index is returned for the requested color, either the exact value or the closest alternative value available. If the image was created from a file, only colors used in the image will be resolved. Colors that only appear in the palette will not be resolved. ### Related Articles Get the index value of the color closest to the specified color. [PHP Image Processing](#)