Web

HTML5 Color Input Value

Validate the value of an HTML5 `<input type="color">` — exactly 6 hex digits with leading hash.

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Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
^#[0-9a-fA-F]{6}$

Raw source: ^#[0-9a-fA-F]{6}$

How it works

^# requires the leading hash. [0-9a-fA-F]{6} requires exactly 6 hexadecimal digits. $ anchors the end. Note this is STRICTER than the general hex-color pattern: the HTML5 color input only accepts the 6-digit form, not the 3-digit shorthand.

Examples

Input

#ff5733

Matches

  • #ff5733

Input

#0F0F0F

Matches

  • #0F0F0F

Input

#fff

No match

—

Common use cases

  • •Form validation before submitting a color value to a backend
  • •Storing color picker output safely
  • •Migrating from looser to stricter color formats
  • •Round-tripping HTML5 input values in design tools

Related patterns

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Parse name=value pairs from an HTTP `Cookie:` header value.

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Match CSS hex color codes in both 3-digit (#RGB) and 6-digit (#RRGGBB) formats.

CSS hsl() / hsla() Color

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Match CSS hsl() and hsla() color functions, capturing hue (0–360), saturation, lightness, and optional alpha.

CSS rgb() Color

Web

Match CSS rgb() and rgba() color functions, including an optional alpha channel.

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