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About RGB to CMYK Converter

Input an RGB value like rgb(0, 255, 255) and Diversify India’s RGB to CMYK converter will convert this value to an CMYK color like 100%, 0%, 0%, 0%.

RGB color parameters are red, green, and blue. The output CMYK parameters are Cyan, Magenta, Yellow, and Key.

Why Convert RGB to CMYK?

Converting RGB to CMYK is crucial for print production. While RGB is used for digital screens, CMYK is the standard color model for printing. This conversion ensures accurate color representation and quality in printed materials, matching the design intent created in RGB on digital devices.

How to Convert RGB to CMYK

To convert RGB to CMYK, you need to transform the red, green, and blue components from their decimal values into the cyan, magenta, yellow, and key (black) components.

  1. Extract the values for Red (R), Green (G), and Blue (B) from the RGB code.
    • Example: rgb(255, 109, 71) gives R = 255, G = 109, B = 71.
  2. Convert the RGB values to a range of 0 to 1 by dividing by 255.
    • R = 255 / 255 ≈ 1
    • G = 109 / 255 ≈ 0.43
    • B = 71 / 255 ≈ 0.278
  3. Calculate the Key (Black) component (K).
    • K = 1 – Max(R, G, B)
    • Example: K = 1 – 1 ≈ 0
  4. Calculate the Cyan (C), Magenta (M), and Yellow (Y) components.
    • If 𝐾 = 1, C = M = Y = 0
    • If 𝐾 ≠ 1, C = (1 – R – K) / (1 – K)​, M = (1 – G – K) / (1 – K), and Y = (1 – B – K) / (1 – K)
  5. Example Calculation:
    • C = (1 – 1 – 0) / (1 – 0) = 0
    • M = (1 – 0.43 – 0) / (1 – 0) = 0.57
    • Y = (1 – 0.278 – 0) / (1 – 0) = 0.722
  6. Convert C, M, Y, and K to percentages.
    • C = 0 × 100 ≈ 0%
    • M = 0.57 × 100 = 57%
    • Y = 0.722 × 100 ≈ 72%
    • K = 0 × 100 ≈ 0%
  7. Combine the CMYK values.
    • Example: 0%, 57%, 72%, 0%

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