INSTALLATION: ============= UIColor+convertAddition.h, UIColor+convertAddition.m, UIImage+pixelsAdditions.h, UIImage+pixelsAdditions.m to you project. then add this to your class: #import "UIImage+pixelsAdditions.h" #import "UIColor+convertAddition.h" USAGE: ====== UIColor addition provide conversion a color to the following: UIColor to HSB \result Hue ... 0 to 360 \result Saturation ... 0 to 1 \result Brightness ... 0 to 1 \see http://docs.gimp.org/2.6/en/gimp-tool-desaturate.html \result grayLightness ... 0 to 1 \result grayAverage ... 0 to 1 \result grayLuminosity ... 0 to 1 \result red ... 0 to 1 \result green ... 0 to 1 \result blue ... 0 to 1 \result alpha ... 0 to 1 UIColor to CMYK \result cyan ... 0 to 100 \result magenta ... 0 to 100 \result yellow ... 0 to 100 \result black ... 0 to 100 \brief Return the CIE xyz as property \result x ... 0 to 1 \result y ... 0 to 1 \result z ... 0 to 1 \brief Return the CIE Lab property .... It is buggy and the value don't seems right!!! \result L ... 0 to 100 \result a ... -xxx to +xxx \result b ... -xxx to +xxx \brief Return the CIE Lab property (hunter version base on D65) .... It is buggy and the value don't seems right!!! \result L ... 0 to 100 \result a ... -xxx to +xxx \result b ... -xxx to +xxx UIImage addition: - (CGPoint)whitePoint; Find the white point coordinate, CGPoint of an image. -(UIColor*)getRGBAatPoint:(CGPoint)point Get an UIColor of a point in an image Previous non issue seems to haev been corrected: (CIE Lab doesn't seems to be accurate. I welcome any person who could help with this.) KNOWN ISSUE: ============ none