Use below UIColor Extension:
extension UIColor {
func lighter(by percentage: CGFloat = 30.0) -> UIColor? {
return self.adjust(by: abs(percentage) )
}
func darker(by percentage: CGFloat = 30.0) -> UIColor? {
return self.adjust(by: -1 * abs(percentage) )
}
func adjust(by percentage: CGFloat = 30.0) -> UIColor? {
var red: CGFloat = 0, green: CGFloat = 0, blue: CGFloat = 0, alpha: CGFloat = 0
if self.getRed(&red, green: &green, blue: &blue, alpha: &alpha) {
return UIColor(red: min(red + percentage/100, 1.0),
green: min(green + percentage/100, 1.0),
blue: min(blue + percentage/100, 1.0),
alpha: alpha)
} else {
return nil
}
}
}
Usage:
let color = UIColor(red:0.96, green:0.54, blue:0.10, alpha:1.0)
color.lighter(30) // returns lighter color by 30%
color.darker(30) // returns darker color by 30%
instead of .lighter()
and .darker()
, you can use .adjust()
with positive values for lightening and negative values for darkening
color.adjust(-30) // 30% darker color
color.adjust(30) // 30% lighter color
Output: