little enhancement

[rogomantik]

You can add the

    public final func readableColor() -> DynamicColor {
        return isLightColor() ? UIColor.blackColor() : UIColor.whiteColor()
    }

and or another that use the inverse / complement at your discretion
it's not much related to the colors elaboration it's more an utility that can be useful

[yannickl]

I don't know if it would be really helpful because the text can be different than just black or white. I think it is better to let the user choose which color he needs rather than enforce him to use only black or white.

[yannickl]

I thought about this issue and I think we should create a contrasted method that return either the white or the black color to contrast against the receiver.

[rogomantik]

Yes maybe somenting
constrastingColor(forBackgroundColor: UIColor, foregroungColor: UIColor) -> UIColor
that act someway like

background color lightRed
foreground color lightRed
-> returns darkRed

background color lightRed
foreground color lightPink
-> returns darkPink

checking backgroundColor.isDark() //ex. false
//if foregroundColor == nil returns black // or white for dark backgrounds
return foregroundColor.darken(amount: x) // x to be calculated according to WCAG 2.0