Color Scheme

ColorLibrary.swift

//
//  ColorLibrary.swift
//
//  Created on 06/01/2017.
//
//  Generated by PaintCode Plugin for Sketch
//  http://www.paintcodeapp.com/sketch
//

import UIKit



class ColorLibrary: NSObject {
    
    
    //MARK: - Colors
    
    static let themeColor = UIColor(hue: 0.246, saturation: 0.843, brightness: 0.826, alpha: 1)
    
    
}

DeriveColor.swift

import UIKit

public extension UIColor {
    
    func withAlpha(_ newAlpha: CGFloat) -> UIColor {
        var hue: CGFloat = 1
        var saturation: CGFloat = 1
        var brightness: CGFloat = 1
        
        self.getHue(&hue, saturation: &saturation, brightness: &brightness, alpha: nil)
        return UIColor(hue: hue, saturation: saturation, brightness: brightness, alpha: newAlpha)
    }
    
    func highlight(withLevel highlight: CGFloat) -> UIColor {
        var red: CGFloat = 1, green: CGFloat = 1
        var blue: CGFloat = 1, alpha: CGFloat = 1
        self.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        return UIColor(red: red * (1-highlight) + highlight,
                       green: green * (1-highlight) + highlight,
                       blue: blue * (1-highlight) + highlight,
                       alpha: alpha * (1-highlight) + highlight)
    }
    
    func shadow(withLevel shadow: CGFloat) -> UIColor {
        var red: CGFloat = 1, green: CGFloat = 1
        var blue: CGFloat = 1, alpha: CGFloat = 1
        self.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
        return UIColor(red: red * (1-shadow),
                       green: green * (1-shadow),
                       blue: blue * (1-shadow),
                       alpha: alpha * (1-shadow) + shadow)
    }
    
    static func hexColor(withString hexString: String, alpha: CGFloat) -> UIColor {
        let hexString: String = (hexString as NSString).trimmingCharacters(in: .whitespacesAndNewlines)
        let scanner          = Scanner(string: hexString as String)
        
        if hexString.hasPrefix("#") {
            scanner.scanLocation = 1
        }
        
        var color: UInt32 = 0
        scanner.scanHexInt32(&color)
        
        let mask = 0x000000FF
        let r = Int(color >> 16) & mask
        let g = Int(color >> 8) & mask
        let b = Int(color) & mask
        
        let red   = CGFloat(r) / 255.0
        let green = CGFloat(g) / 255.0
        let blue  = CGFloat(b) / 255.0
        return UIColor(red: red, green: green, blue: blue, alpha: alpha)
    }
    
}