What happens if I enter a value above 255?

255 is the maximum valid value for any RGB channel, representing full intensity — this tool flags an out-of-range value as invalid rather than silently clamping or wrapping it, since a value above 255 usually indicates a mistake in the source data.

Is the RGB to HEX conversion exact?

Yes — RGB and HEX represent the identical underlying color values, just in decimal versus hexadecimal number format. Converting between them involves no rounding or approximation, since it's a direct base conversion of the same numbers.

Why does each HEX pair correspond to one RGB channel?

Each pair of hexadecimal digits in a HEX code represents one channel's value in base-16 — since hexadecimal digits range from 00 to ff (0 to 255 in decimal), each two-digit pair maps exactly to the 0-255 range of an RGB channel, which is exactly why HEX codes are always 6 digits for a full RGB color.

Can I use this for colors with transparency (alpha)?

This tool converts the three standard RGB channels only. For a color including transparency, CSS supports an 8-digit HEX format (with two additional digits for alpha) or the rgba()/hsla() functions, which aren't covered by this specific 6-digit HEX conversion.

Why would I have RGB values without already knowing the HEX code?

Some sources naturally output RGB rather than HEX — reading a pixel's color from a canvas, certain color-picking APIs, or a design tool's RGB input mode — making this conversion a genuinely common need rather than a redundant reverse of HEX-to-RGB.

Free Online RGB to HEX Converter

Features

Runs entirely in your browser
Privacy-first — your data is never uploaded
Real-time, instant results
100% free, no sign-up required
Works on desktop, tablet, and mobile
No installation needed

Who uses this tool?

DesignersDevelopersArtistsMarketers

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About RGB to HEX Converter

RGB and HEX represent the same color information, just in different number formats — RGB expresses each color channel as a separate decimal number from 0 to 255, while HEX packs all three channels into a single compact hexadecimal string. Converting from RGB to HEX is the reverse of the more commonly needed HEX-to-RGB direction, useful whenever you have individual channel values that need combining into a single CSS-ready code.

This tool takes red, green, and blue values (each 0-255) and converts them into the exact corresponding 6-character HEX code, with a live color swatch preview so you can visually confirm the result matches what you expect before using it.

This conversion is common when a color comes from a source that outputs individual RGB channel values — a canvas pixel read operation, a color-picking library, or a design tool's RGB display mode — but you need the compact HEX format for a CSS stylesheet or design file.

This is useful for converting a programmatically generated or measured RGB color into CSS-ready HEX, double-checking a color's HEX equivalent when you only have the individual channel numbers, or general color format conversion work.

How it works

Enter red, green, and blue values. Each from 0 to 255.
View the HEX equivalent. With a live swatch preview to confirm the color visually.
Copy the HEX code. Ready to paste directly into CSS or a design file.

Examples

Converting RGB to HEX

Input

R: 79, G: 70, B: 229

Output

#4f46e5