I made a little game to see if I could train myself to see the red, green and blue components of colors. It shows a color, and I adjust the sliders. When I click done, it shows what the sliders should have been, and below that it shows what color I made. It also shows a score, which is 0 if the colors are as different as possible, and 1 if they are the same — only accounting for hue and saturation.
I'm better than I thought with an average score over my past 10 attempts of 0.866, as shown.. whatever that means.