a flat color code for swift and this scheme is come from http://flatuicolors.com/

FlatColor.swift

import UIKit

extension UIColor{
    public class func turquoiseFlatColor() -> UIColor {
        return UIColor(red: 26 / 255, green: 188 / 255, blue: 156 / 255, alpha: 1.0)
    }
    public class func greenSeaFlatColor() -> UIColor {
        return UIColor(red: 22 / 255, green: 160 / 255, blue: 133 / 255, alpha: 1.0)
    }
    public class func emeraldFlatColor() -> UIColor {
        return UIColor(red: 46 / 255, green: 204 / 255, blue: 113 / 255, alpha: 1.0)
    }
    public class func nephritisFlatColor() -> UIColor {
        return UIColor(red: 39 / 255, green: 174 / 255, blue: 96 / 255, alpha: 1.0)
    }
    public class func peterRiverFlatColor() -> UIColor {
        return UIColor(red: 52 / 255, green: 152 / 255, blue: 219 / 255, alpha: 1.0)
    }
    public class func belizeHoleFlatColor() -> UIColor {
        return UIColor(red: 41 / 255, green: 128 / 255, blue: 185 / 255, alpha: 1.0)
    }
    public class func amethystFlatColor() -> UIColor {
        return UIColor(red: 155 / 255, green: 89 / 255, blue: 182 / 255, alpha: 1.0)
    }
    public class func wisteriaFlatColor() -> UIColor {
        return UIColor(red: 142 / 255, green: 68 / 255, blue: 173 / 255, alpha: 1.0)
    }
    public class func wetAsphaltFlatColor() -> UIColor {
        return UIColor(red: 52 / 255, green: 73 / 255, blue: 94 / 255, alpha: 1.0)
    }
    public class func midnightBlueFlatColor() -> UIColor {
        return UIColor(red: 44 / 255, green: 62 / 255, blue: 80 / 255, alpha: 1.0)
    }
    public class func sunFlowerFlatColor() -> UIColor {
        return UIColor(red: 241 / 255, green: 196 / 255, blue: 15 / 255, alpha: 1.0)
    }
    public class func carrotFlatColor() -> UIColor {
        return UIColor(red: 230 / 255, green: 126 / 255, blue: 34 / 255, alpha: 1.0)
    }
    public class func alizarinFlatColor() -> UIColor {
        return UIColor(red: 231 / 255, green: 76 / 255, blue: 60 / 255, alpha: 1.0)
    }
    public class func cloudsFlatColor() -> UIColor {
        return UIColor(red: 236 / 255, green: 240 / 255, blue: 241 / 255, alpha: 1.0)
    }
    public class func concreteFlatColor() -> UIColor {
        return UIColor(red: 149 / 255, green: 165 / 255, blue: 166 / 255, alpha: 1.0)
    }
    public class func orangeFlatColor() -> UIColor {
        return UIColor(red: 243 / 255, green: 156 / 255, blue: 18 / 255, alpha: 1.0)
    }
    public class func pumpkinFlatColor() -> UIColor {
        return UIColor(red: 211 / 255, green: 84 / 255, blue: 0 / 255, alpha: 1.0)
    }
    public class func pomegranateFlatColor() -> UIColor {
        return UIColor(red: 192 / 255, green: 57 / 255, blue: 43 / 255, alpha: 1.0)
    }
    public class func silverFlatColor() -> UIColor {
        return UIColor(red: 189 / 255, green: 195 / 255, blue: 199 / 255, alpha: 1.0)
    }
    public class func asbestosFlatColor() -> UIColor {
        return UIColor(red: 127 / 255, green: 140 / 255, blue: 141 / 255, alpha: 1.0)
    }
}