不知道是否还有其他人会觉得有用。将Apple Crayon Colorlist转换为扩展程序。只需添加到您的项目中，编译器就会扩展调色板。
添加后的用法：例如：
self.shapeLayer.strokeColor = UIColor.aluminium.cgColor
//
// UIColorExtension.swift
//
// Created by Edward Hasted on 01/05/2019.
// Copyright © 2019 Edward Hasted. All rights reserved.
//
import UIKit
extension UIColor {
static let aluminium = UIColor(red: 160/255, green: 159/255, blue: 160/255, alpha: 1)
static let aqua = UIColor(red: 0/255, green: 140/255, blue: 255/255, alpha: 1)
static let asparagus = UIColor(red: 136/255, green: 133/255, blue: 1/255, alpha: 1)
static let banana = UIColor(red: 255/255, green: 251/255, blue: 109/255, alpha: 1)
static let blueberry = UIColor(red: 0/255, green: 46/255, blue: 255/255, alpha: 1)
static let bubblegum = UIColor(red: 255/255, green: 122/255, blue: 255/255, alpha: 1)
static let cantaloupe = UIColor(red: 255/255, green: 206/255, blue: 110/255, alpha: 1)
static let carnation = UIColor(red: 255/255, green: 127/255, blue: 211/255, alpha: 1)
static let cayenne = UIColor(red: 137/255, green: 17/255, blue: 0/255, alpha: 1)
static let clover = UIColor(red: 2/255, green: 131/255, blue: 1/255, alpha: 1)
static let eggplant = UIColor(red: 73/255, green: 26/255, blue: 136/255, alpha: 1)
static let fern = UIColor(red: 69/255, green: 132/255, blue: 1/255, alpha: 1)
static let flora = UIColor(red: 104/255, green: 249/255, blue: 110/255, alpha: 1)
static let grape = UIColor(red: 137/255, green: 49/255, blue: 255/255, alpha: 1)
static let honeydew = UIColor(red: 206/255, green: 250/255, blue: 110/255, alpha: 1)
static let ice = UIColor(red: 104/255, green: 253/255, blue: 255/255, alpha: 1)
static let iron = UIColor(red: 84/255, green: 84/255, blue: 83/255, alpha: 1)
static let lavender = UIColor(red: 210/255, green: 120/255, blue: 255/255, alpha: 1)
static let lead = UIColor(red: 30/255, green: 30/255, blue: 30/255, alpha: 1)
static let lemon = UIColor(red: 255/255, green: 250/255, blue: 3/255, alpha: 1)
static let lime = UIColor(red: 131/255, green: 249/255, blue: 2/255, alpha: 1)
static let liquorice = UIColor(red: 0/255, green: 0/255, blue: 0/255, alpha: 1)
static let mandarin = UIColor(red: 255/255, green: 153/255, blue: 0/255, alpha: 1)
static let magenta = UIColor(red: 255/255, green: 57/255, blue: 255/255, alpha: 1)
static let magnesium = UIColor(red: 184/255, green: 184/255, blue: 184/255, alpha: 1)
static let maraschino = UIColor(red: 255/255, green: 33/255, blue: 1/255, alpha: 1)
static let maroon = UIColor(red: 137/255, green: 22/255, blue: 72/255, alpha: 1)
static let mercury = UIColor(red: 232/255, green: 232/255, blue: 232/255, alpha: 1)
static let midnight = UIColor(red: 0/255, green: 24/255, blue: 136/255, alpha: 1)
static let mocha = UIColor(red: 137/255, green: 72/255, blue: 0/255, alpha: 1)
static let moss = UIColor(red: 1/255, green: 132/255, blue: 72/255, alpha: 1)
static let nickel = UIColor(red: 136/255, green: 135/255, blue: 136/255, alpha: 1)
static let ocean = UIColor(red: 0/255, green: 74/255, blue: 136/255, alpha: 1)
static let orchid = UIColor(red: 110/255, green: 118/255, blue: 255/255, alpha: 1)
static let salmon = UIColor(red: 255/255, green: 114/255, blue: 110/255, alpha: 1)
static let seafoam = UIColor(red: 3/255, green: 249/255, blue: 135/255, alpha: 1)
static let silver = UIColor(red: 208/255, green: 208/255, blue: 208/255, alpha: 1)
static let sky = UIColor(red: 106/255, green: 207/255, blue: 255/255, alpha: 1)
static let snow = UIColor(red: 255/255, green: 255/255, blue: 255/255, alpha: 1)
static let spindrift = UIColor(red: 104/255, green: 251/255, blue: 208/255, alpha: 1)
static let spring = UIColor(red: 5/255, green: 248/255, blue: 2/255, alpha: 1)
static let steel = UIColor(red: 110/255, green: 110/255, blue: 110/255, alpha: 1)
static let strawberry = UIColor(red: 255/255, green: 41/255, blue: 135/255, alpha: 1)
static let tangerine = UIColor(red: 255/255, green: 136/255, blue: 2/255, alpha: 1)
static let teal = UIColor(red: 0/255, green: 134/255, blue: 136/255, alpha: 1)
static let tin = UIColor(red: 135/255, green: 134/255, blue: 135/255, alpha: 1)
static let tungsten = UIColor(red: 58/255, green: 58/255, blue: 58/255, alpha: 1)
static let turquoise = UIColor(red: 0/255, green: 253/255, blue: 255/255, alpha: 1)
}