GSColor

GSColor is a group of C functions that extends CGColor of CoreGraphics. It provides these tasks:

• Obtaining the RGBA components of a color.
• Caching common colors.
• Blending two colors together.

Example code

CGColor brownColor = GSColorForSystemColor(kGSBrownColor);
CGColor myBlueColor = GSColorCreateColorWithDeviceRGBA(0.2, 0.3, 0.9, 1);
CGColor blendedColor = GSColorCreateBlendedColorWithFraction(brownColor, myBlueColor, 0.25);  // 75% brown + 25% myBlue.
CGFloat blendedRedComponent = GSColorGetRedComponent(blendedColor);
 
CGColorRelease(myBlueColor);
CGColorRelease(blendedColor);

Header

• http://github.com/kennytm/iphone-private-frameworks/blob/master/GraphicsServices/GSColor.h