andreyin@
Let's look first color table of nes used in this fx;
TRY_COLOR (vec3 (000.0, 088.0, 000.0));
TRY_COLOR (vec3 (080.0, 048.0, 000.0));
TRY_COLOR (vec3 (000.0, 104.0, 000.0));
I would like to change this color table by custom then go to here : http://html-color-codes.info/
Blue like color is ; rgb format 35,65,174.. so edit nes color table
TRY_COLOR (vec3 (035.0, 065.0, 174.0));
for red
TRY_COLOR (vec3 (255.0, 000.0, 000.0)); etc.....
Try to play like this and look the result ...
Regards