What is the difference between hex and RGB?

They represent the same colors differently. Hex uses a 6-character code (#RRGGBB in hexadecimal). RGB uses three numbers 0-255 for red, green, and blue channels. #FF0000 = rgb(255, 0, 0) = pure red.

Which format should I use in CSS?

Both work in CSS. Hex (#FF5733) is more compact. RGB (rgb(255, 87, 51)) is more readable and allows easy alpha channel addition with rgba(). Use whichever your team prefers.

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Free Hex to RGB Converter — Convert Color Codes Instantly

Last updated: February 2026 4 min read By Daniel Foster Converter Tools

When You Need to Convert Colors

CSS uses hex codes (#FF5733). JavaScript and many APIs use RGB values (rgb(255, 87, 51)). Design tools may use one or the other. Converting between formats manually involves math with hexadecimal — or you can just use a converter.

How to Convert Hex and RGB

Open the Hex-RGB Converter
Enter a hex code (like #FF5733) or RGB values (like 255, 87, 51)
The other format updates instantly
Click to copy either value

Try Hex-RGB Converter — free, private, unlimited.

Open Hex-RGB Converter

Daniel Foster Accessibility & UX Writer

Daniel has spent six years as an independent accessibility consultant auditing websites for WCAG compliance across healthcare, finance, and government clients. He writes about accessibility tools with professional rigor.

Free Hex to RGB Converter — Convert Color Codes Instantly

When You Need to Convert Colors

How to Convert Hex and RGB

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