Opacity / Alpha Calculator
Set a color's alpha/opacity and get its HEX8 + RGBA. Everything runs on your device — fast, free, and private.
The result will appear here…
or press Ctrl+Enter
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
#00B8E6, alpha=50%
Example Output
HEX8 #00b8e680 · RGBA rgba(0,184,230,0.5)
How to Use
- 1Enter a color or data in the Input field.
- 2Set "More settings" if needed, then click Run (or Ctrl+Enter).
- 3Copy the result — a swatch is shown next to each value.
About Opacity / Alpha Calculator
The Opacity / Alpha Calculator adds an alpha (transparency) channel to a color at the percentage you choose, then shows the result as HEX8 (e.g. #00b8e680) and rgba().
Useful for overlays, shadows, and semi-transparent surfaces in CSS.
FAQ
Is my data sent to a server?
No. Opacity / Alpha Calculator runs entirely in your browser — your data never leaves your device.