RGB to CMYK color conversion
RGB to CMYK color code converter and conversion formula.
RGB to CMYK converter
Enter red, green and blue color levels (0..255) and press the Convert button:
RGB to CMYK conversion formula
The R,G,B values are divided by 255 to change the range from 0..255 to 0..1:
R' = R/255
G' = G/255
B' = B/255
The black key (K) color is calculated from the red (R'), green (G') and blue (B') colors:
K = 1-max(R', G', B')
The cyan color (C) is calculated from the red (R') and black (K) colors:
C = (1-R'-K) / (1-K)
The magenta color (M) is calculated from the green (G') and black (K) colors:
M = (1-G'-K) / (1-K)
The yellow color (Y) is calculated from the blue (B') and black (K) colors:
Y = (1-B'-K) / (1-K)
RGB to CMYK table
| Color | Color name | (R,G,B) | Hex | (C,M,Y,K) |
| --- | --- | --- | --- | --- | | | Black | (0,0,0) | #000000 | (0,0,0,1) | | | White | (255,255,255) | #FFFFFF | (0,0,0,0) | | | Red | (255,0,0) | #FF0000 | (0,1,1,0) | | | Green | (0,255,0) | #00FF00 | (1,0,1,0) | | | Blue | (0,0,255) | #0000FF | (1,1,0,0) | | | Yellow | (255,255,0) | #FFFF00 | (0,0,1,0) | | | Cyan | (0,255,255) | #00FFFF | (1,0,0,0) | | | Magenta | (255,0,255) | #FF00FF | (0,1,0,0) |