Color practice
CMYK and color conversion: what changes between screen and print
Conversion is not a magic translation between two identical worlds. It is a practical hand-off between light on a screen and ink on a surface.
RGB and CMYK describe different conditions
RGB describes emitted light: red, green, and blue channels combine on a display. CMYK describes ink: cyan, magenta, yellow, and black are layered onto a material that reflects light back to us.
That is why a bright screen color can lose intensity when it moves into print. The conversion is a useful estimate, not a promise that every device, paper, and ink combination will look identical.
Design a safe hand-off
Keep the source HEX values with the project, ask for the intended print profile, and proof the colors that carry meaning: brand accents, small text, skin tones, and high-contrast pairs.
For web work, keep the palette in a display-ready color space and check contrast in the final context. For print work, treat the conversion as the beginning of proofing, not the end.