I kind of got lost there. Can you answer these questions.
1. Can you explain if I need to set all 7 parameters (through events) if I only need to recolor the red parts of my character sprite?
I did this:
+On start of layout
->Enable Replace Color
->Set effect Replace Color index 3 to 0 (don't know what this means, just experimenting)
doesn't change any color
Sorry for not being clear, to use this effect you have to set a color to change, then a color to replace it, it is not based on the color palette, but on the value of the color (separated in 3 values, R G and B), each of them goes from 0 to 255.
to change one color in particular, you have to know those 3 values of the color (an image editor will tell you easily), then you set those value in the effect proprieties R source, G source, B source (that means you are saying that this color will be changed to something else)
When it is done, you have to change the value of R replace, G replace, B replace to the color you want, I suppose you want to change this with events, it is indeed :
"set effect ReplaceColor, parameter index #, Value #", the parameter indexes are the one I've said before, so you would have to change the parameter 3 (to set the R replace), the parameter 4 (to set the G replace), and the parameter 5 (to set the B replace); that means that this is the color it'll change into, you can also set the tolerance, if you want color that are close enough to be changed too
Also, the webGL support works in preview (if the browser supports it, that shouldn't be a problem on desktop, except if you are using chrome on XP/Vista)
hope that helps.