// Class extension

let emerald = UIColor(rgb:0x2ECC71)
let darkEmerald = UIColor(rgba: emerald.toRGBA()!, blackAmount: 0.1) 
let lightEmerald = UIColor(rgba: emerald.toRGBA()!, whiteAmount: 0.1)

let peterRiver = UIColor(red8Bit: 52, green8Bit: 152, blue8Bit: 219, alpha: 1.0)

// Utilities
let (redComponent, _, _, _) = WDDecomposeRGBA(emerald.toRGBA()!)
let myColorHexValue = WDCompose8bitRGBA(UInt(redComponent * 255) , 100, 200, 1.0)