About HH Color Lab
HH Color Lab is a free collection of browser-based color tools and guides for designers, developers, teachers, students and anyone who works with digital color.
Why this site exists
A color often travels as a short code, but choosing, converting and checking colors involves several different systems that do not always agree. Many tools simply hand you a number. HH Color Lab was built to show how HEX, RGB, HSL, HSV and CMYK relate to each other, how newer models such as Lab and Oklch fit in, and why a result looks the way it does, so you can make better decisions and learn along the way.
What you can do here
- Pick and extract: the Color Picker, the Image Color Picker and the Color Wheel for harmonies.
- Create: palettes, gradients, Tailwind shade scales, color mixes and even cross stitch charts from a photo.
- Convert: between 13 color formats, RGB and HEX, technical formats and practical formats used in code, print and design tools.
- Check accessibility: the Contrast Checker, the Color Blindness Simulator and a short color vision screening.
- Browse and learn: palettes, a color library, color names, a color chart, color analysis, creative guides and our blog.
How the tools work
Everything runs in your browser, using standard published formulas. Colors are handled in sRGB. HSL, HSV and HWB are direct transformations of RGB. CIE XYZ, Lab, LCh and Luv conversions use standard reference whites, and Oklab and Oklch follow the published Oklab definition. Contrast ratios use the WCAG 2.x relative-luminance formula, color-vision simulations use the Machado et al. matrices, and palettes from images are found with a median-cut algorithm.
Some results are estimates by nature. CMYK values are mathematical conversions; real printing depends on the printer, the paper and the ICC profile. Colors also look different from one screen to another. Where this matters, the tool pages say so.
Corrections and quality
We test the tools on phones, tablets and computers, and we correct mistakes quickly when readers report them. If you find a wrong value, a broken link or an unclear explanation, please tell us and include the page address.
Who is behind it
HH Color Lab is created and maintained by Hariprasad Dyavarkonda from Solapur, Maharashtra, India. You can write to us at hhcolorpicker@gmail.com.
How the site is funded
The tools are free to use. The site shows advertisements from Google AdSense, which help pay for hosting and development. Ads are labelled by Google, are kept separate from the tools, and never change the colors or results you get. Read more in our advertising and cookies section.
Our promises
- No sign-up and no payment needed.
- Images you open are processed in your browser and are not uploaded to our servers.
- No software downloads and no misleading buttons.
- Honest explanations, and quick corrections when you report an error.