How to convert a hex color (with optional alpha) to RGBA

1. Enter the hex value

   Drop the hex value into the "Hex (#RGB … #RRGGBBAA)" field. Four lengths are supported: `#RGB`, `#RGBA`, `#RRGGBB`, `#RRGGBBAA` — the leading `#` is optional, case doesn't matter.

2. How alpha is parsed

   If the hex includes alpha (4 or 8 digits) it's used; otherwise alpha defaults to 1 (fully opaque). The byte value is divided by 255 to get a 0–1 float, then trimmed to 4 decimal places.

3. Press Run

   Output returns `r`, `g`, `b` (0–255), `a` (0–1 float), `alphaByte` (0–255), `hex` (8-digit normalised), `hexRgb` (6-digit, no alpha), and `rgbaCss` (the ready-to-paste `rgba(r, g, b, a)` string).

4. Use hex vs hexRgb appropriately

   Use `hex` (8-digit) in CSS where 8-digit hex is supported. Use `hexRgb` when you need a legacy 6-digit hex plus a separate `opacity` or `rgba()` declaration.