RGB to HEX Converter

RGB describes a screen color as red, green and blue intensities from 0 to 255. HEX writes the same three numbers in base 16, two digits each, so 255 becomes FF and the color becomes a compact code like #1E90FF. This converter gives you the code and shows the working, which is handy for homework, exams or checking a value by hand.

How to use this tool

1. Enter red, green and blue from 0 to 255.
2. Optionally set an opacity below 100% to get an 8-digit #RRGGBBAA code.
3. Read the HEX code, its 3-digit shorthand (if one exists) and the step-by-step table.
4. For several colors, paste one RGB triple per line into the batch box.

Formula

For each channel: quotient = ⌊value ÷ 16⌋, remainder = value mod 16; the HEX pair is the digit for the quotient followed by the digit for the remainder (10 = A, 11 = B, 12 = C, 13 = D, 14 = E, 15 = F).

Opacity becomes a fourth pair: round(opacity × 255). A shorthand #RGB exists only when every pair is a repeated digit, e.g. #FF8800 = #F80.

Example

rgb(30, 144, 255): 30 ÷ 16 = 1 remainder 14 → 1E; 144 ÷ 16 = 9 remainder 0 → 90; 255 ÷ 16 = 15 remainder 15 → FF. Together: #1E90FF (dodger blue). At 50% opacity, 0.5 × 255 = 127.5 rounds to 128 = 80, giving #1E90FF80.