These rely on more shades/finer details than the Pokemon cards, but I haven't had a problem, even with the low-quality ones. [Edit: turns out color is not required] You might play with your screen's brightness/contrast settings to see if it needs to be tuned. Otherwise, you might want to talk to Nintendo about a repair, especially if you're having trouble with the physical cards, or just move to a place with better lighting. Also, in case it wasn't obvious, you can click a card to zoom in and move between them with the left and right keys.