RGB to CMYK Converter

This tool converts RGB color inputs to CMYK using a standard, ICC-based approach suited for digital design and prepress workflows. It accepts integer RGB values in the 0-255 range or normalized 0-1 values, and outputs CMYK percentages.
The conversion follows the canonical sRGB to CMYK formula: normalize r, g, b to 0-1, compute K = 1 - max(r, g, b); if K equals 1, then C, M, Y are zero; otherwise C = (1 - r - K) / (1 - K), M = (1 - g - K) / (1 - K), Y = (1 - b - K) / (1 - K). Results are scaled to 0-100% and rounded to integer values. Note that printer ICC profiles affect the final color; this provides a solid reference.
Who benefits: designers, prepress technicians, and print shops needing a reliable baseline for color proofs and production workflows. It supports quick checks during asset creation and enables consistent handoffs to printers. Distinguishing factors include explicit handling of edge cases (pure black, near-black inputs) and clear documentation of profile influence.
Core features include: RGB input handling, ICC-based CMYK output, optional RGB hex reference, and profile-aware guidance for production. Use cases span packaging, marketing collateral, and digital artwork prepared for print.