Color Converter
Convert HEX, RGB, HSL, HSB and analyze WCAG accessibility contrast
Color models in web design
Digital colors are expressed in different models. HEX (#FF5733) is the web standard. RGB (255, 87, 51) describes Red, Green, Blue components. HSL (Hue, Saturation, Lightness) is more intuitive for designers as it matches our natural color perception.
When to use each model?
HEX: CSS, HTML, sharing color codes | RGB: programmatic manipulation, blending effects | HSL: creating harmonious palettes, hue variations | HSB/HSV: design software (Figma, Adobe) | CMYK: print (converted differently depending on the press).
WCAG contrast for accessibility
WCAG (Web Content Accessibility Guidelines) define minimum contrast ratios. Level AA: 4.5:1 for normal text, 3:1 for large text. Level AAA: 7:1 for normal text. Our tool automatically checks compliance for your color combinations.
Why choose OmniTools?
OmniTools brings together 20+ carefully crafted online tools built by our team. Every tool is designed to be fast, accurate and usable without sign-up. We believe essential everyday utilities — calculators, converters, generators — should be freely available with a clean interface and no intrusive ads. Our commitment: your data never leaves your browser.
Our tools are used daily by students, real-estate professionals, developers, designers, travelers and curious minds. Each tool comes with detailed documentation, formulas, reference values and practical tips to help you get the most out of it. We regularly ship new tools and improvements based on community feedback.
Frequently asked questions
Is this tool really free?
Yes, OmniTools is completely free, with no sign-up and no usage limit. No credit card required.
Is my data sent to a server?
No. All calculations and conversions run in your browser. Your data stays private on your device.
Does it work on mobile?
Yes, the interface is fully responsive and optimized for smartphones, tablets and desktops.
How often is the tool updated?
We continuously improve our tools based on user feedback to guarantee accuracy and reliability.