How do I convert hex to RGB by hand?

Split the 6-digit hex into three pairs and convert each pair from base 16 to base 10. For example

Is my colour data uploaded anywhere?

No. The conversion runs entirely in your browser using JavaScript — nothing is uploaded or stored on a server.

How does 3-digit shorthand expand to 6 digits?

Each digit is doubled. #fff expands to #ffffff, and #abc expands to #aabbcc. The tool does this automatically before converting, so shorthand and full codes give the same RGB result.

What range do the R, G and B channels use?

Each channel is an 8-bit value from 0 to 255, because each hex pair (00–ff) maps to 0–255. rgb(0, 0, 0) is black and rgb(255, 255, 255) is white.

How do I add transparency to an RGB colour?

Use the rgba() form, which adds an alpha channel from 0 (fully transparent) to 1 (opaque), for example rgba(59, 130, 246, 0.5). This converter outputs the solid rgb() value; append the alpha yourself.

Does an invalid hex code do anything?

If the input is not a valid 3- or 6-digit hex code, the tool shows a short error and waits — it does not guess a colour. Fix the code (e.g. remove stray characters) and the RGB value appears again.

Hex to RGB Converter

Hex to RGB converter

This tool converts any hex colour code into its RGB equivalent and shows a live swatch. It is for developers and designers moving colours between CSS, design tools and code where one format is required and another is on hand. Paste a hex value or use the picker, and read the rgb() string plus each channel.

How it works

A hex colour encodes three 8-bit channels in base 16. The converter strips an optional leading #, and if you pass 3-digit shorthand it doubles each digit (#abc → #aabbcc). It then splits the 6 digits into three pairs and converts each pair from base 16 to a 0–255 decimal value for red, green and blue. Those become the rgb(r, g, b) string and the individual channel readouts. Anything that is not a valid 3- or 6-digit hex code is rejected with an inline message rather than a guessed colour.

Example

For #3b82f6, the three pairs convert as:

3b (hex) = 3×16 + 11 = 59
82 (hex) = 8×16 + 2 = 130
f6 (hex) = 15×16 + 6 = 246

So #3b82f6 becomes rgb(59, 130, 246).

Hex	RGB
#000000	rgb(0, 0, 0)
#ffffff	rgb(255, 255, 255)
#fff	rgb(255, 255, 255)
#ff0000	rgb(255, 0, 0)
#3b82f6	rgb(59, 130, 246)

Everything happens in your browser — nothing is uploaded.