CSS RGB Color Generator

The css rgb color generator writes a picked colour as a stylesheet-ready rgb() string, with its rgba(), hex, hsl() and oklch() equivalents on the rows beside it.

What is CSS RGB Color Generator?

rgb() is the notation of numbers: three channels, unambiguous, and the shape that image editors, screenshot inspectors and API responses all speak. The css rgb color generator produces it from a visual pick — set the colour by eye and copy the numeric channel colour that comes back — which removes the step where a channel gets transcribed wrong. The page is one colour field above a five-row panel: hex, rgb, rgba, hsl and oklch, every row copyable.

• rgb — decimal channels in red, green, blue order, printed as rgb(59, 130, 246), which is the row this page is named for.
• rgb value generator output is clamped and rounded to whole 0–255 integers, so the string is exactly what a browser computes.
• rgba — the four-argument form with alpha fixed at 1, since the field has no alpha control.
• hex — upper-case six digits, for token files that prefer the short spelling.
• hsl and oklch — the same colour in channel-percentage and perceptual coordinates.

The conversions come from the shared colour parser and formatters rather than from a second implementation, and the panel is the same component the hex, hsl and formatting pages render. A value typed into the field is parsed and normalised to six-digit hex first, so a pasted rgb() string, a named colour and a hex value all reach the same base before the rows are built; the rgb row then re-expands that base into channel integers. Because the row is derived rather than typed, the channel order cannot be swapped and the channels cannot fall outside 0–255.

Reading a value off the panel rather than typing it is what keeps a numeric channel color honest: a hand-typed triple can be one channel out and still look plausible, while a copied string cannot be. Keep one convention for the rgb notation across a project — commas here or spaces there, but not both — so that a search for the notation finds every declaration that uses it.

• No alpha: the rgba row always reads 1, and an alpha in an input value is dropped when the field normalises it.
• Integer form only: percentage channels and the modern space-separated syntax are not printed here.
• Bare values, not full declarations, so the property name and any fallback are still yours to write.
• No image sampling or eyedropper input: the field takes a colour value, not pixels.

Reach for it when a spec, a ticket or a design note quotes rgb() and the value has to be exact — the notation exists precisely for that dialogue with tooling. When the task is editing the numbers rather than quoting them, the channel adjusters work the three values directly; when the source is a screenshot or an image, the image picker samples the pixel and hands the value on. Keep one convention in a codebase, because mixing comma and space syntax inside a project makes every future search-and-replace guesswork, and let this page hold the commas so nobody has to remember them. That is a small discipline with a visible payoff: the notation arrives correct, in one spelling, from a value that was chosen rather than recalled.

How to use CSS RGB Color Generator

1. Set the colour visually with the picker field.
2. Read the rgb() string from the second row of the panel.
3. Copy it into the stylesheet, spec or design ticket that quotes channel values.
4. Compare against the hex row when a token file has to agree with the stylesheet.

When to use CSS RGB Color Generator vs related tools

Use this when a spec or a tool quotes rgb(). The HEX generator and the HSL generator are the same panel for their own notations, the RGB channel adjuster edits the three numbers instead of quoting them, and the alpha generator covers the translucent fourth channel this page leaves at 1.

Privacy & Security

This tool runs entirely in your browser — no data ever leaves your device. There is no server round-trip, no upload, no logging, and no account required. Your input is processed locally using client-side JavaScript and is never stored, transmitted, or accessible to anyone else. When you close the tab, everything disappears.

Frequently asked questions about CSS RGB Color Generator