Color Issues
Color Mode
The color mode of submitted files must be CMYK. CMYK refers to the primary colors in art production: red, blue, and yellow. If your files are submitted using any other color standard, such as RGB or Pantone, they will be converted to CMYK. Conversion from one color standard to another may cause colors to shift do to gamut constraints. By having you do your own conversions, you can control the color result of your printed piece. For a detailed technical explanation of RGB and CMYK color spaces see below
Gamut Constraints
When we look at the RGB and CMY color models which are essentially models of color production we see that the gamut of colors we can reproduce is far less than what we can actually see.
While not precise, the illustration clearly shows this.
RGB
Red, green, and blue are the primary stimuli for human color perception and are the primary additive colors. The relationship between the colors can be seen in this illustration:
CMY(K)
Cyan, magenta, and yellow correspond roughly to the primary colors in art production: red, blue, and yellow. In the illustration, you can see the CMY counterpart to the RGB model shown above.
Rich Black
To make a Rich Black (C-60 M-40 Y-40 K-100) should be applied to larger fills of black or font sizes greater than 3/8" wide to ensure a dense color. Our rich black ink total is 240%. Any ink builds greater than 240% may not print properly.
