Convert decimal to UIColor in Swift.

UIColor+Decimal.swift

// Usage: UIColor(decimal: -6926516)

import Foundation

extension UIColor {
  
  convenience init(decimal c: Int) {
    let red = CGFloat((c>>16) & 0xFF) / CGFloat(255)
    let green = CGFloat((c>>8) & 0xFF) / CGFloat(255)
    let blue = CGFloat((c>>0) & 0xFF) / CGFloat(255)

    self.init(red: red,
              green: green,
              blue: blue,
              alpha: 1.0)
  }
  
}