RGB, HEX and HSL
Conversion
Convert with explicit units, definitions and assumptions.
Formula
Normalize RGB to [0,1]; lightness=(max+min)/2; saturation=chroma/(1−|2L−1|).
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Hue is reported as 0 for achromatic colours.
Example Calculation
Example inputs
- Red: 255
- Green: 0
- Blue: 0
RGB (255,0,0) gives #ff0000 and HSL (0°,100%,50%).
Frequently asked questions
How do I use this calculator?
Enter red, green, blue. The result updates automatically. Use Reset to restore the example values.
What method does it use?
Normalize RGB to [0,1]; lightness=(max+min)/2; saturation=chroma/(1−|2L−1|).. Hue is reported as 0 for achromatic colours.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.