This is another variant of the other fx called texture transition;
You must play with color component sliders RGB and growing factor slider ...
demo:
http://gigatron3k.free.fr/html5/C2/FX/grcolor
PS: if you are interested from please write to ... me
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Cool, you could use this for fast lighting.
This is absolutely perfect ... could I possibly commission this? We need a method to fade / shimmer a sprite with a hex or rbg value ?