Convert RGB values to a hex code
RGB defines a color as three numbers — red, green, and blue, each from 0 to 255. A hex code packs those same three channels into one short hexadecimal string such as #3B82F6. Designers and developers often convert RGB to hex because hex is the most compact, copy-friendly format for HTML and CSS and the form most design tools display by default.
Pick a color or enter RGB values and the converter returns the matching hex code instantly, ready to paste into a stylesheet or share in a design spec.
How the RGB-to-hex math works
Each RGB channel (0–255) becomes a two-digit hexadecimal pair (00–FF). To convert one channel, divide the number by 16: the quotient is the first hex digit and the remainder is the second, where 10–15 are written as A–F.
- Red 59 → 59 ÷ 16 = 3 remainder 11 →
3B. - Green 130 → 130 ÷ 16 = 8 remainder 2 →
82. - Blue 246 → 246 ÷ 16 = 15 remainder 6 →
F6.
Concatenate the pairs and prefix a hash: rgb(59, 130, 246) becomes #3B82F6. A key detail is zero-padding — a channel that converts to a single digit, like 5 → 5, must be written as 05 so every channel keeps exactly two digits and the final code is six characters long.
Why hex is so common
Hex codes are unambiguous and terse: one token instead of three comma-separated numbers, which makes them easy to drop into HTML attributes, CSS, and design handoffs. Most color pickers, brand guidelines, and graphics applications present colors in hex first, so converting your RGB output to hex keeps your values consistent with the rest of a project.
Things to watch when converting
Make sure each RGB value is a whole number in the 0–255 range before converting; values produced by JavaScript color math are sometimes fractional and should be rounded first. If all three channels share the same pair of digits — for example #3399FF — the code can be written in three-digit shorthand (#39F), but the long form always works and is safest. Hex codes are case-insensitive, so #3b82f6 and #3B82F6 are the same color. Finally, if your RGB color carries an alpha value, standard six-digit hex cannot store it; use the eight-digit #RRGGBBAA form or keep the color in rgba() when you need transparency.
Convert RGB values to a hex code
RGB defines a color as three numbers — red, green, and blue, each from 0 to 255. A hex code packs those same three channels into one short hexadecimal string such as #3B82F6. Designers and developers often convert RGB to hex because hex is the most compact, copy-friendly format for HTML and CSS and the form most design tools display by default.
Pick a color or enter RGB values and the converter returns the matching hex code instantly, ready to paste into a stylesheet or share in a design spec.
How the RGB-to-hex math works
Each RGB channel (0–255) becomes a two-digit hexadecimal pair (00–FF). To convert one channel, divide the number by 16: the quotient is the first hex digit and the remainder is the second, where 10–15 are written as A–F.
- Red 59 → 59 ÷ 16 = 3 remainder 11 →
3B. - Green 130 → 130 ÷ 16 = 8 remainder 2 →
82. - Blue 246 → 246 ÷ 16 = 15 remainder 6 →
F6.
Concatenate the pairs and prefix a hash: rgb(59, 130, 246) becomes #3B82F6. A key detail is zero-padding — a channel that converts to a single digit, like 5 → 5, must be written as 05 so every channel keeps exactly two digits and the final code is six characters long.
Why hex is so common
Hex codes are unambiguous and terse: one token instead of three comma-separated numbers, which makes them easy to drop into HTML attributes, CSS, and design handoffs. Most color pickers, brand guidelines, and graphics applications present colors in hex first, so converting your RGB output to hex keeps your values consistent with the rest of a project.
Things to watch when converting
Make sure each RGB value is a whole number in the 0–255 range before converting; values produced by JavaScript color math are sometimes fractional and should be rounded first. If all three channels share the same pair of digits — for example #3399FF — the code can be written in three-digit shorthand (#39F), but the long form always works and is safest. Hex codes are case-insensitive, so #3b82f6 and #3B82F6 are the same color. Finally, if your RGB color carries an alpha value, standard six-digit hex cannot store it; use the eight-digit #RRGGBBAA form or keep the color in rgba() when you need transparency.
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Frequently Asked Questions
Common questions about the RGB to Hex Converter
Convert each channel (0–255) to a two-digit hexadecimal number. Divide the value by 16 for the first digit and use the remainder for the second, writing 10–15 as A–F. Pad single digits with a leading zero, then join the three pairs after a hash.
It is #3B82F6: 59 becomes 3B, 130 becomes 82, and 246 becomes F6. The converter produces this result automatically.
Hex is base-16, so it needs six extra symbols beyond 0–9. The letters A through F represent the values 10 through 15. A pair like FF therefore equals 255, the maximum for a channel.
Yes. Hex channels are whole numbers from 0 to 255, so round any fractional RGB values first. Values out of range should be clamped to 0–255 before conversion to produce a valid code.
No. #3b82f6 and #3B82F6 represent the identical color. Uppercase is common in style guides for readability, but CSS accepts either.
ℹ️ Disclaimer
This tool is provided for informational and educational purposes only. All processing happens entirely in your browser - no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results. Use at your own discretion.