In my opinion, when playing poker looking at the monitor, it is better to use 4 colors, since with a fairly long game, sensitivity to the perception of suits, especially of the same color, may weaken, so it is better to use 4 colors in order to protect yourself from unnecessary mistakes. from my experience, I will say that there was a situation when it seemed that I had collected a flush, and as a result, buba crawled to the chirvas, since then I have been playing in 4 colors.