Color Converter

Convert between HEX, RGB, and HSL color formats with live preview. Runs entirely in your browser.

Understanding CSS Color Formats — HEX vs RGB vs HSL

Colors on the web are represented in several formats. Each has advantages depending on your use case. Understanding when to use HEX, RGB, or HSL helps you write cleaner CSS and communicate colors effectively with designers and design tools.

HEX Color Codes Explained

A HEX color code is a 6-digit hexadecimal number prefixed with #, for example #4f46e5. Each pair of digits represents Red, Green, and Blue channel intensity from 00 (0) to FF (255). HEX is the most common color format in CSS, design tools (Figma, Sketch, Photoshop), and brand guidelines. Shorthand like #fff expands to #ffffff. HEX with alpha: #4f46e580 (8-digit HEX).

RGB and RGBA Color Values

RGB defines colors using Red, Green, and Blue channel values from 0 to 255: rgb(79, 70, 229). RGBA adds an alpha channel for opacity: rgba(79, 70, 229, 0.5). RGB is useful when you need to programmatically adjust individual channels — for example, lightening a color by increasing all three values proportionally.

HSL and HSLA Color Values

HSL represents colors as Hue (0–360° on the color wheel), Saturation (0—100%), and Lightness (0—100%): hsl(244, 76%, 59%). HSL is the most intuitive format for humans — you can easily create color variations by adjusting saturation or lightness while keeping the hue constant. This makes HSL ideal for building color palettes, theming systems, and CSS custom properties.

When to Use Each Color Format

Color Conversion Formulas

Converting between HEX and RGB is straightforward (parse hex pairs into decimal). Converting between RGB and HSL involves calculating the hue from min/max channel values, saturation from the chroma, and lightness as the midpoint between min and max. This tool handles all conversions instantly with live preview.

Frequently Asked Questions

This tool converts between HEX (e.g., #4F46E5), RGB (e.g., rgb(79, 70, 229)), and HSL (e.g., hsl(244, 76%, 59%)) color formats. Enter a value in any format and instantly see the equivalent values in all other formats with a live color preview.
Yes. The color preview uses the browser's native CSS rendering engine, so what you see is exactly what will appear on web pages. The tool displays the color using the computed CSS background-color property, matching real-world browser behavior.
The tool supports standard HEX, RGB, and HSL formats. For colors with alpha transparency, you can manually add the alpha value to the generated CSS output (e.g., rgba(79, 70, 229, 0.5) or hsla(244, 76%, 59%, 0.5)).
No. All color conversions are performed entirely in your browser using JavaScript math operations. No data is transmitted to any server. You can safely use this tool offline after the page loads.
HEX is the most compact and widely used in design tools and CSS. RGB is best when you need to manipulate individual color channels programmatically. HSL is the most intuitive for creating color variations — adjusting lightness for hover states or saturation for muted palettes — making it ideal for CSS custom properties and theming.