Convert between print CMYK and web RGB/HEX. Useful before sending designs to a printer.
C
M
Y
K
⚠ Print accuracy notice
This conversion uses standard sRGB ↔ uncalibrated CMYK math. Actual print output varies by paper, ink, and ICC profile (SWOP, Japan Color, Fogra). For precise results, use Photoshop/Acrobat with proper ICC profiles or request a proof from your printer.
This conversion uses standard sRGB ↔ uncalibrated CMYK math. Actual print output varies by paper, ink, and ICC profile (SWOP, Japan Color, Fogra). For precise results, use Photoshop/Acrobat with proper ICC profiles or request a proof from your printer.
RGB vs CMYK
RGB uses additive color mixing (Red, Green, Blue) for screens. CMYK uses subtractive mixing (Cyan, Magenta, Yellow, Key/Black) for print inks. They have different gamuts, so vibrant RGB colors (especially neons) cannot be exactly reproduced in CMYK.
FAQ
Can I send these CMYK values to a printer?
OK for casual printing (cards, flyers). For brand-critical print, use ICC-profile based conversion in Photoshop/Illustrator.
Why does K (black) have a value when others do?
Rich Black uses CMY + K for deeper darkness. Body text should use K-only (100%) to avoid ink bleed.
Why does my color look muddy in CMYK?
RGB neons/fluorescents are outside CMYK gamut. Use Spot/Pantone or fluorescent ink for vibrant print.
Formula used?
Standard sRGB→CMYK: K=1-max(R,G,B), C=(1-R-K)/(1-K), etc. No ICC profile applied.