To ensure the closest match to your desired color for print, we recommend setting up your artwork files in CMYK color mode.
Otherwise, if you'd like to specify your own CMYK values, you can view and download our CMYK color chart here. Let us know the color values in the instructions field when you upload your artwork or request any changes you'd like during proofing.
Please note that due to variations in monitors and browsers, colors may appear different in print than they do on screen. If it is important that your colors are exact, it is highly recommended that you order a sample first. Check out all of our custom sample options here!
Related article: Can you print RGB colors?