RGB to Hex
Convert RGB color values to hex color codes.
Convert RGB color values to hex color codes.
This free RGB to Hex from KX Toolkit is part of our all-in-one online toolkit. It runs entirely in your browser, so your data never leaves your device for client-side operations. 100% free, forever - no paywall, no credit card, no trial.
How to use the RGB to Hex
- Drop your image into the upload area, or click to browse.
- Pick the output format, size or compression level.
- Click "Process" - the tool runs and shows a preview.
- Download the result. Most tools delete your file from the server immediately after.
What you can do with the RGB to Hex
- Optimise images for web pages and faster Core Web Vitals.
- Resize photos for social media specs (1080×1080, 1200×630, etc.).
- Convert HEIC, AVIF or WebP to a more compatible format.
- Strip EXIF metadata before sharing photos online.
Why use KX Toolkit's RGB to Hex
- Browser-based: Works on Windows, macOS, Linux, iOS and Android - no install, no extension.
- Privacy-first: Client-side tools never upload your data; server-side tools delete files right after processing.
- Mobile-friendly: Full feature parity on phones and tablets - not a stripped-down view.
- Fast: Optimised for instant feedback. No artificial waiting screens, no email-gated downloads.
- One hub for everything: 300+ tools across SEO, text, image, PDF, code, color, calculators and more - skip switching between sites.
Tips for the best results
Compress your image AFTER resizing - running them in that order produces smaller files at the same visual quality.
Related Image Tools
If you find this tool useful, explore the full Image Tools collection or browse our complete tool directory. KX Toolkit is built for marketers, developers, designers, students and anyone who needs a quick utility without signing up for yet another SaaS.
How do I convert RGB values to a HEX code?
Type each RGB value into the red, green and blue fields, ranging from 0 to 255. The HEX code updates instantly below. You can also paste an entire CSS rgb function string and the tool extracts the numbers automatically. The result is shown in both six character HEX and the shorthand three character HEX when possible. Copy buttons sit next to each version so you can drop the code straight into a stylesheet, design tool or another tool that expects HEX input.
What does each RGB number stand for?
RGB describes a colour as the amount of red, green and blue light blended together to make it. Each value runs from 0 to 255, where 0 means none of that light and 255 means full intensity. So pure red is 255, 0, 0 and pure white is 255, 255, 255 because all three lights are at maximum. This additive model matches how screens emit light, which is why RGB is the standard for digital design.
Can I convert RGBA with alpha transparency?
Yes. Switch on the alpha field and a fourth value appears, ranging from 0 to 1 or 0 to 100 percent depending on your preference. The HEX output extends to eight characters, where the last two encode the alpha. Some tools and browsers only accept six character HEX, so the converter still shows the matching opaque HEX as well. Both forms describe the same colour, just with or without the transparency information.
Why are my converted HEX codes uppercase or lowercase?
HEX is case insensitive, so #ABCDEF and #abcdef refer to the same colour. The tool defaults to lowercase because most modern code styles prefer it, but you can switch the toggle to uppercase if your project uses that convention. Many design tools display HEX codes in uppercase by default, so matching that style makes copy and paste between tools tidier. Whichever case you choose, the resulting colour value is identical in any browser.
Can I convert several RGB values at once?
Yes. Switch to batch mode and paste a list of RGB strings, one per line. The tool returns a table with HEX values for each row, ready to copy as plain text or CSV. This is useful for migrating an old design system to a HEX based palette or generating CSS variables from a reference document. Lines that are not valid RGB values are flagged so you can fix them before exporting.
Does the converter support the new CSS color function syntax?
Yes. In addition to standard sRGB, you can paste a colour written with the CSS color function and the converter handles it correctly. Wide gamut display P3 values are clamped into the closest sRGB colour and warned about, since HEX is defined in sRGB. If you are working in a wide gamut workflow, copy the original color function output rather than the HEX equivalent to preserve the extended range on capable displays.
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