Best
For best results use bright, solid, contrasting colors and avoid subtle shades. Colors that look best include combinations of 100% process colors like Red, Royal Blue, Green, Yellow, Magenta, Process Blue, Black, and of course, White. You can check the color values (RGB or CMYK) which ideally should be all either 0 or 100%.
Alternative
Halftones and Gradients - Because we are using pigments that resist fading, we use a somewhat more coarse halftone screen (80 lpi) than would normally be used in offset printing. Our stickers are designed for "bumper view." You may notice dithering (or tiny dots) up-close as this is a result of a solid ink process, not that of a conventional home inkjet printer. Some gradients may also come out poorly.
Bad
Certain colors such as grey, brown, some blues, and purples will not print well.