Free Online HEX to RGB Converter
Convert colors between HEX, RGB, and HSL in an instant. Our Free Online HEX to RGB Converter lets you type a hex code or pick a color visually, then reads out every common format so you can paste it straight into CSS, design tools, or code. Everything runs in your browser - no install, no upload.
Color Models Explained: RGB, HEX, HSL, CMYK
Different jobs describe color in different ways. RGB expresses a color as three numbers (red, green, blue) from 0 to 255, matching how screens emit light. HEX is that same RGB value written as a base-16 string like #ff5722 - compact and the default in HTML and CSS. HSL describes a color by hue, saturation, and lightness, which is far more intuitive when you want to build palettes or adjust shade. CMYK describes ink coverage and is used for print, not screens.
When to Use Each Color Model
Use HEX when you are writing CSS or handing a color to a developer - it is the lingua franca of the web. Use RGB (or RGBA, which adds an alpha channel) when you need transparency or are working in a system that expects numeric channels. Use HSL when you are designing: tweaking lightness to darken a brand color, or rotating hue to find a complementary accent, is much easier in HSL than in HEX.
How HEX and RGB Relate
A six-digit HEX code is just three pairs of hex digits: the first pair is red, the second green, the third blue. #ff5722 therefore means red 255 (ff), green 87 (57), and blue 34 (22). Convert each pair from base-16 to base-10 and you have the RGB triple - which is exactly what this tool does for you instantly, in either direction.
WCAG Color Contrast and Accessibility
Choosing colors is also a responsibility. The Web Content Accessibility Guidelines (WCAG) require a contrast ratio of at least 4.5:1 for normal body text and 3:1 for large text. A common mistake is pairing a brand color with a similar lightness for text, producing a ratio that fails for low-vision users. Once you have your HEX or RGB values, test them against your background - readable contrast is part of the design, not an afterthought.
Color Theory Basics for Branding
Strong palettes usually start from one anchor color and build outward. Pick a primary HEX, then derive an accent using a complementary or analogous hue in HSL, and finally add neutral grays for backgrounds and text. Keeping saturation and lightness consistent across your accent set makes a brand feel cohesive, and converting between HEX, RGB, and HSL - as this tool does - is the fastest way to experiment with those variations.