Convertisseur de Couleur en Niveaux de Gris

About Grayscale Conversion

The Grayscale Color Converter transforms any color into its gray equivalent using one of three methods: average, luminosity, or lightness. Each method produces a slightly different gray, letting you pick the one that best matches your visual intent.

All conversion runs in your browser — your color data never leaves your device.

How to Use

1. Enter a HEX color code or use the color picker.
2. Choose a conversion method: average, luminosity, or lightness.
3. View the grayscale result next to the original color.
4. Copy the output HEX code or read the RGB and HSL values.

Conversion Methods

• Average — (R + G + B) / 3. Simple mean of all channels.
• Luminosity — 0.299R + 0.587G + 0.114B. Weighted average matching human eye sensitivity; produces the most perceptually accurate gray.
• Lightness — (max(R,G,B) + min(R,G,B)) / 2. Average of the brightest and darkest channels.

Use Cases

• Previewing designs in grayscale for accessibility and readability
• Choosing neutral gray tones derived from a brand color
• Simulating how images look for color-blind users
• Creating monochromatic design systems
• Analyzing brightness contrast between color pairs