The swf_mulcolor() function sets the global
multiply color to the rgba color
specified. This color is then used (implicitly) by the
swf_placeobject(),
swf_modifyobject() and the
swf_addbuttonrecord() functions. The color of
the object will be multiplied by the rgba
values when the object is written to the screen.
Замечание:
The rgba values can be either positive or
negative.