Format colors in CMYK colors
It is important that the files are formatted in CMYK colors. PMS colors and RGB colors must be converted to CMYK colors. Note that when converting the colors may sometimes result in an unavoidable color difference outcome. In the event your file has black colored text, we advise you to format the text in C: 0, M: 0, Y: 0, K: 100.
How do I convert my file to CMYK?
InDesign: Choose File > Document setup > CMYK.
Illustrator: Choose File > Document mode > CMYK.
How can I make something deep black in my file?
We advise creating black colors as C: 0, M: 0, Y: 0, K: 100. If you want to use an even darker black, choose C: 20 M: 20 Y: 20 K: 100. Note: if you use a darker black with a small/thin font, the text may close.