Mr Calcu | Convert HEX, RGB, HSL & CMYK codes instantly—create stunning visuals and print-perfect palettes with ease.

What Is a Color Code Converter?

A color code converter translates colors between different color models used in digital and print environments.

• HEX: Six-digit hexadecimal code for web development.
• RGB: Red, Green, Blue values for digital displays.
• HSL: Hue, Saturation, Lightness for intuitive editing.
• CMYK: Cyan, Magenta, Yellow, Key (Black) for printing.

Mathematical Formulas for Conversion

RGB to CMYK

R', G', B' = R / 255, G / 255, B / 255
K = 1 - max(R', G', B')
C = (1 - R' - K) / (1 - K)
M = (1 - G' - K) / (1 - K)
Y = (1 - B' - K) / (1 - K)

RGB to HSL

R', G', B' = R / 255, G / 255, B / 255
maxVal = max(R', G', B')
minVal = min(R', G', B')
L = (maxVal + minVal) / 2

if maxVal == minVal:
  H = S = 0  # achromatic
else:
  delta = maxVal - minVal
  S = delta / (1 - abs(2 * L - 1))
  H = ... (depends on maxVal)

Real-World Case Studies

1. Web Branding

• Designers use HEX for color consistency in UI/UX.
• Colors are adjusted in HSL for brightness control.
• RGB ensures accurate screen rendering.

2. Packaging Print Accuracy

• Designs begin in HSL for easy palette generation.
• Converted to CMYK for press-ready files.
• Results are verified via printed proofs.

Important Edge Cases

• Pure Black (#000000): CMYK = 0% 0% 0% 100%
• Pure White (#FFFFFF): CMYK = 0% 0% 0% 0%
• Hue 360° = Hue 0°: Both represent red in HSL.
• Zero Saturation: HSL becomes grayscale, hue is ignored.
• CMYK Gamut Limits: Some RGB values may not fully convert to CMYK.

How to Use This Tool

1. Enter your color code in any format (HEX, RGB, HSL, or CMYK).
2. View instantly converted values in other color models.
3. Use previews to verify accuracy for your platform (screen or print).

Start converting now and bring your brand's colors to life—across every screen and every page.