About the RGB to HEX Converter
This converter changes a colour from RGB to HEX. You type the RGB value into three number boxes for red, green and blue, and the HEX value appears at once, together with a swatch so you can see the colour. Each of red, green and blue is turned into a two-digit hexadecimal number from 00 to FF, and the three pairs are written one after another after a hash sign. Out-of-range values are explained instead of being silently changed. The result can be copied with one tap. Everything is calculated in your browser, so nothing you type is uploaded.
Updated October 2026
How to use the RGB to HEX Converter
- 1Enter the RGB value in the boxes.
- 2Watch the colour swatch change.
- 3Read the HEX value in the large result box.
- 4Check the second line for the matching value in another notation.
- 5Press Copy result to keep it.
Why convert RGB to HEX
Web designers get RGB values from design tools and image editors, but CSS, HTML and many style guides use hex codes. Converting once gives you a short code to paste anywhere. Hex codes are compact, easy to copy and understood by every browser.
The same colour can be written in several notations, and each tool or file format prefers one. Having a quick converter means you do not have to guess or repeat the sum by hand when you move a colour from one place to another.
How the RGB to HEX conversion works
Each of red, green and blue is turned into a two-digit hexadecimal number from 00 to FF, and the three pairs are written one after another after a hash sign.
For red 255, green 136 and blue 0, 255 is FF, 136 is 88 and 0 is 00, so the colour is #FF8800, a bright orange.
- #000000 is black: all three channels are 0.
- #FFFFFF is white: all three channels are 255.
- #FF0000 is pure red, #00FF00 pure green and #0000FF pure blue.
Limits and good habits
Values outside the allowed range, such as an RGB channel above 255 or a percentage above 100, are rejected with a message. Round-trip conversions can drift by one unit because of rounding. If you need a colour to match exactly in print, use the profile supplied by your printer.
The Color Converter on this site shows HEX, RGB, HSL, HSV and CMYK together for one colour, and the Color Contrast Checker tells you whether two colours are readable together.
Phone and computer
On a phone, tap each box and type; the swatch and the HEX value update as you go. On a computer the boxes sit on the left and the result on the right. The page works the same on both, and the Copy button gives you the value to paste into your design tool or style sheet. For the opposite direction use HEX to RGB Converter, and the Color Palette Generator builds matching colours.
Features
- RGB to HEX as you type
- Colour swatch
- Clear messages for values out of range
- Copy the result
- Private: nothing is uploaded
- Works on phone and computer
Frequently asked questions
How do I convert RGB to HEX?
Each of red, green and blue is turned into a two-digit hexadecimal number from 00 to FF, and the three pairs are written one after another after a hash sign. For red 255, green 136 and blue 0, 255 is FF, 136 is 88 and 0 is 00, so the colour is #FF8800, a bright orange.
What is the RGB to HEX formula?
Each of red, green and blue is turned into a two-digit hexadecimal number from 00 to FF, and the three pairs are written one after another after a hash sign.
What is rgb(255, 136, 0) as HEX?
#FF8800. For red 255, green 136 and blue 0, 255 is FF, 136 is 88 and 0 is 00, so the colour is #FF8800, a bright orange.
Are the RGB to HEX results exact?
The calculation is exact, but the values are rounded to whole numbers or whole percentages for display, so converting back and forth can differ by one unit.
Why does the colour look different on my screen and on paper?
Screens emit light and paper reflects it, and every screen and printer has its own profile. The converter gives the standard mathematical values; for print jobs, check a printed proof.
Is my input uploaded?
No. The conversion is done in your browser, and nothing is sent to a server.