Type R, G, B values, drag the alpha slider, and preview real transparency on checkered, white or dark backgrounds before you copy.
✓ Accepts: 255, 128, 64 or rgba(255, 128, 64, 0.5) or paste from anywhere
Everything runs in your browser - no colors are ever uploaded
Toggle the preview between checkered, white and dark so you see exactly how your alpha value composites - not just a flat swatch.
Type R, G, B separately, paste "rgba(255,128,64,0.5)" as a whole string, or use the picker and eyedropper.
HEX, HEX8, RGB, RGBA, HSLA and a HEX + opacity fallback for older CSS, all live and click-to-copy.
No sign-up, no watermark, convert as many colors as you like.
Type R, G, B values directly, or use the color picker and eyedropper.
Set transparency from 0–100%, and watch the preview update live.
Click RGBA, HEX8, HSLA or the CSS opacity fallback - it's copied instantly.
Alpha - the transparency channel. It's a value from 0 (fully transparent) to 1 (fully opaque) added on top of the same red, green and blue used in RGB.
Enter R, G, B separately, or paste a whole string like rgb(255,128,64) or rgba(255,128,64,0.5) into the first field - it splits into the right places automatically, alpha included.
Yes - switch the preview background between checkered, white and dark above the color box, so you can see exactly how the alpha value composites over each surface.
No. Every conversion happens locally in your browser. Nothing you type, pick or slide is sent to a server.
Yes - the output grid shows HEX, 8-digit HEX8, RGB, RGBA, HSLA and a HEX + opacity fallback for older CSS, all sharing the same alpha value, all click-to-copy.
No install, no account. Just enter RGB values, set alpha, and copy.
Try it now