RGBA to HEX Converter

Conversion procedure

1. Parse RGBA: accept rgba(r, g, b, a) or four comma-separated numbers. R, G, B follow the same 0–255 rule as RGB. Alpha may be written between 0 and 1 (typical for CSS) or, if you enter a value between 1 and 255, it is interpreted as an 8-bit alpha and divided by 255.
2. Resolve to internal sRGB: R, G, B are used as-is; alpha is clamped to 0–1. All later steps that only care about red, green, and blue use these same channel values; formats that support opacity (RGBA, 8-digit HEX) read alpha from this internal value.
3. Build HEX: each of R, G, B is clamped to 0–255, rounded to an integer, and written as two uppercase hexadecimal digits. The calculator concatenates them as #RRGGBB. If the internal alpha is less than 1 (from RGBA or 8-digit hex input), two more hex digits are appended so the string becomes #RRGGBBAA; otherwise the six-digit form is used.
4. Finalize: the result string is what you copy from the calculator. The line under the fields summarizes the path in short form (HEX ← sRGB ← RGBA). Rounding is intentional so values read like typical CSS; tiny differences versus other apps can still appear because of integer hue, saturation, lightness/value, or ink percentages.