title: Return lighter color from SKColor using HSL lightness factor
body: <p>I have an iOS SKColor, that I want to convert to a lighter shade (that is opaque with no opacity/no transparency), therefore I would like to implement a function using the HSL lightness, that returns an SKColor. ie. inside the function, convert the original SKColor to the HSL equivalent, then apply a value to the HSL lightness to get a lighter color shade, then convert this HSL color back to an SKColor that I can use.</p>