API ColorMixin SetRGBA

Changes a ColorMixin to a new color.
 color:SetRGBA(r, g, b [, a])
 color:SetRGB(r, g, b)
== Arguments ==
; r, g, b : - Values between 0 and 1.
; a : - Value between 0 and 1, or nil to leave undefined (some methods will default to 100%).
== Details ==
* SetRGB() eliminates any previous alpha value.
== Patch changes ==
* 
== See also ==
* - Returns the properties.
== References ==