Unit converter
Convert 100 units across 14 measurement categories.
Open toolColor converter
Convert HEX and RGB colors to HEX, RGB and HSL.
Input & settings
Up to 1 MB · stays on this device
Result
Choose your settings and run the tool.
Readable text? Aa Bb 123
Foreground composited on your background
Foreground composited on your background
MonTueWedThuFriSatSun
How this tool works
Accepts short or long HEX with optional alpha and comma-separated rgb()/rgba() syntax. Outputs HSL as well as RGB and HEX. This tool does not perform color-profile conversion. Text contrast follows WCAG relative luminance. Transparent foregrounds are composited onto the opaque background. AA normal text needs 4.5:1; large text needs 3:1. A color test alone is not an accessibility audit.
Inputs and results stay in this page’s memory until you leave or reset it. Downloads remain on your device. Review the result before using it in another application.
Practical reading
Check text contrast with the actual foreground and background
Use luminance and transparent-color compositing instead of judging a swatch by eye.