darken and lighten colours

Light and dark colours

darken(color, factor = 1.4)

lighten(color, factor = 1.4)

Arguments

color

Colour name.

factor

Lightening/darkening factory.

Value

A new rgb colour

Details

From https://gist.github.com/Jfortin1/72ef064469d1703c6b30.

Examples

darkFirebrick <- darken("firebrick")
lightFirebrick <- lighten("firebrick")
plot(c(1.5, 2, 2.5), c(1, 1.25, 1),
     pch = 19, cex = 150,
     col = c(darkFirebrick, "firebrick", lightFirebrick))