API Frame SetBackdropColor

s provide two methods to apply tint to their :
* SetBackdropColor() tints the background component of a frame's backdrop
* SetBackdropBorderColor() tints the border component of a frame's backdrop
 frame:SetBackdropColor(red, green, blue[, alpha])
 frame:SetBackdropBorderColor(red, green, blue[, alpha])
==Arguments==
;red : Number - Proportion of the original red colour to remain, from 0 to 1
;green : Number - Proportion of the original green colour to remain, from 0 to 1
;blue : Number - Proportion of the original blue colour to remain, from 0 to 1
;alpha : Number - Proportion of the original opaqueness to remain, from 0 to 1
== Notes ==
* These values only modify the existing colour and alpha of the backdrop files; it its not possible to be lighter or more opaque than the original
* Subsequent calls to the same function will override previous ones; i.e. they apply to the original texture directly rather than interacting with the previously-tinted one
== Patch changes ==
*
== See also ==
* 
* 
== References ==