It is difficult to choose, not knowing how the colors will be used. I am not finding a yellow that is close to the card. I'm getting the color right, but they've been either more toned down than the card, or a fair amount darker. I really would like to find a yellow that is close to the depth and brightness of the card, so as to get the relationship of colors correct. Or should I not worry about it, and just choose one that goes well with my pinks, blues and greenns?