RGB to CMYK

This tool accepts red, green, blue inputs in 0–255 and returns CMYK percentages. It uses standard math: normalize to RGB in [0,1], compute C', M', Y' as 1-R', 1-G', 1-B', derive K as min(C', M', Y'), then compute C, M, Y as (C'-K)/(1-K), (M'-K)/(1-K), (Y'-K)/(1-K). If K equals 1, CMY are 0. Outputs are scaled to 0–100 with two decimals. It handles edge cases, such as pure black or white, and clamps out-of-range inputs.\nConceptually, RGB is additive; printers use subtractive CMYK. This converter provides a device-agnostic translation suitable for proofs and specification documents. It does not perform ICC-profile mapping or device calibration; users should apply printer-specific profiles for final proofs.\nWho benefits: graphic designers, prepress teams, packaging designers, QA, educators. Core features include numeric validation, deterministic results, precise rounding, and formatted outputs. Use cases include defining color budgets, translating on-screen colors to print values, and creating reference CMYK values for proofs. Unique value lies in fast, self-contained calculation with transparent, documented formulas.\nThis tool is designed for quick, accurate, reproducible RGB→CMYK conversions that fit typical print workflows and design pipelines.