Hex #FF0000 to RGBA (Red)

#FF0000 converts to rgba(255, 0, 0, 1), which is fully opaque pure red.

Embed this tool on your site

<iframe src="https://abracalc.com/converter/hex-to-rgba/ff0000-to-rgba/embed.html" width="340" height="320" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Enter your hex color code (e.g. #3a86ff or #f0f).
Set the alpha value between 0 (invisible) and 1 (opaque).
Copy the rgba() result into your CSS.

Pure red (#FF0000) is expressed as rgba(255, 0, 0, 1) in RGBA color notation.

Frequently asked questions

What is RGBA?: RGBA is like RGB but with a fourth channel — alpha — that controls opacity. 0 is fully transparent, 1 is fully opaque.
Can I use 3-digit hex codes?: Yes. #abc is automatically expanded to #aabbcc before conversion.