Convert colors instantly between HEX code and RGB values, with a live color preview swatch.
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Both the HEX and RGB systems are used to describe digital colors on screens, but in two different formats: RGB expresses a color as three separate values for Red, Green, and Blue, each between 0 and 255, while HEX writes the same three values combined into a single six-digit hexadecimal code (prefixed with #), which is the more common format used in writing CSS code and web design. This tool converts between the two formats automatically in both directions: type a HEX code to instantly see its RGB equivalent, or enter R, G, and B values to get the corresponding HEX code, with a live preview of the resulting color. Every screen color is ultimately built by combining varying intensities of just these three colors of light, since red, green, and blue are the additive primary colors a digital display uses to reproduce the full visible color spectrum. With each of the three channels able to take any of 256 values, the total number of distinct representable colors works out to 256 cubed, or just over 16.7 million combinations.
Every color visible on a digital screen — whether a phone, monitor, or television — is built from just three components of light mixed together: red, green, and blue. This is the additive color model, fundamentally different from the subtractive color mixing familiar from paint (where mixing colors together makes them darker), since combining red, green, and blue light at full intensity produces white, not black.
RGB notation expresses each of these three components as a number from 0 (no light of that color) to 255 (maximum intensity), giving 256 possible intensity levels per channel and roughly 16.7 million possible combined colors in total (256 cubed). RGB(255, 0, 0) is pure red, RGB(0, 0, 0) is black (the complete absence of light), and RGB(255, 255, 255) is white (all three channels at maximum).
HEX notation represents the exact same three numbers in a more compact format designed for writing code efficiently: each of the three 0–255 values is converted to a two-digit hexadecimal number (00 to FF), and the three pairs are concatenated together with a # prefix, producing codes like #FF0000 for pure red. Because hexadecimal is more compact than decimal for representing byte values, and because CSS and web design tooling have standardized around it, HEX has become the default format seen throughout web development, design software, and brand style guides, even though RGB remains equally valid and often more intuitive for reasoning about a color's actual composition.
Converting between the two formats requires nothing more than converting each of the three individual 0–255 values between decimal and two-digit hexadecimal — a mechanical process, but one prone to manual error, which is exactly the kind of small but consequential mistake this kind of converter tool is built to eliminate entirely.
Beyond simple conversion, understanding the RGB breakdown behind a HEX code gives real, practical insight: a code with a high red value and low green and blue values will appear as some shade of red; a code where all three values are close together and moderately high will appear as some shade of gray; and colors with one channel noticeably higher than the other two will lean toward that channel's associated hue. This kind of pattern recognition is genuinely useful for designers, developers, and anyone adjusting colors in code without a visual color picker readily available.
They describe the exact same color using different notation — RGB lists the red, green, and blue components as three separate numbers from 0–255, while HEX packs those same three values into one 6-digit base-16 code prefixed with #.
Yes — shorthand 3-digit HEX codes are automatically expanded (each digit is doubled, so #4CA becomes #44CCAA) before conversion, matching how browsers interpret shorthand HEX in CSS.
Each color channel is stored using 8 bits of data, and 8 bits can represent 256 distinct values (0 through 255), which is why every RGB channel is capped at 255.