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# PHP imagecolorresolvealpha - Get the index value of a specified color with alpha or the closest possible alternative [PHP Image Processing](#) imagecolorresolvealpha — Get the index value of a specified color with alpha or the closest possible alternative. ### Syntax int imagecolorresolvealpha ( resource $image , int $red , int $green , int $blue , int $alpha ) This function guarantees to return a color index for the requested color, either the exact value or the closest possible alternative. **Note:** This function requires GD 2.0.1 or later (recommended version 2.0.28 and later). ### Parameters * **image** An image resource returned by an image creation function (e.g., imagecreatetruecolor()). * **red** The value of the red component. * **green** The value of the green component. * **blue** The value of the blue component. * **alpha** A value between 0 and 127. 0 indicates completely opaque, 127 indicates completely transparent. The color parameters are integers between 0 and 255, or hexadecimal numbers between 0x00 and 0xFF. ### Return Value Returns a color index. ### Example Get a color from the logo. The output of the above example is similar to: Array( => 16777215 => 2130706632) ### Related Articles Get the color closest to the specified color with alpha. [PHP Image Processing](#)