Convert a value to a color object. Accepts R color names (strings), hex integers, lists with r/g/b/a components, or existing color objects.
Examples
as_color("red")
#> color(r = 255, g = 0, b = 0, a = 255)
as_color(list(r = 255, g = 0, b = 0, a = 255))
#> color(r = 255, g = 0, b = 0, a = 255)
