Are there any limitations on the colors or graphics I can use on my card?

No.
Virtually any color is available to you for anything that is printed on the card. This includes photos, logos, background graphics, text, etc. We recommend printing all bar codes with black. Due to the nature of dye sublimation printing, colors are sometimes slightly different than what you see on the screen. For this reason, we recommend ordering a sample card to evaluate, allowing you make any necessary color adjustments.