Color function in Swift
import UIKit
extension UIColor {
static func rgb(r: CGFloat, g: CGFloat, b: CGFloat) -> UIColor {
return UIColor(red: r/255, green: g/255, blue: b/255, alpha: 1)
}
static let backgroundColor = UIColor.rgb(r: 21, g: 22, b: 33)
static let outlineStrokeColor = UIColor.rgb(r: 234, g: 46, b: 111)
static let trackStrokeColor = UIColor.rgb(r: 56, g: 25, b: 49)
static let pulsatingFillColor = UIColor.rgb(r: 86, g: 30, b: 63)
}