Color picker

Color picker is a free tool that lets you select a color in your browser and get its value in the format you need.

What does a color picker return?

A color picker returns a numeric representation of the color selected on the wheel. The same visible color can be expressed in several formats, most commonly hexadecimal, RGB, RGBA, HSL, or HSLA.

These formats describe color in different ways. Hexadecimal and RGB specify red, green, and blue channel values. HSL uses hue, saturation, and lightness, which can make systematic adjustments easier. Formats with an alpha channel also describe opacity.

• Hexadecimal values use a hash followed by hexadecimal digits, such as #336699.
• RGB values usually express each channel as a number from 0 to 255, such as rgb(51, 102, 153).
• HSL values describe a hue angle and percentage values for saturation and lightness, such as hsl(210, 50%, 40%).
• RGBA and HSLA add transparency. An alpha value of 0 is fully transparent, and 1 is fully opaque.

CSS also supports named colors, but names cover only a fixed set and are less suitable for exact design tokens. Generated numeric values are usually easier to transfer between design systems, stylesheets, and application code.

How do I use the color picker?

Select the Color field, choose the point you want on the color wheel, then use the resulting value in the format your application needs. The work is done entirely in your browser, and the color input is never uploaded to a server.

For an existing interface, start with the format already used in the codebase. This avoids unnecessary color conversions and makes pull requests easier to review. When inspecting third-party data, determine whether its values include opacity before replacing them with a seemingly equivalent color.

A practical pre-deployment workflow is to select or reproduce the intended color, copy the appropriate notation, and check it in the actual component state. Test normal, hover, focus, and disabled states separately because opacity and inherited styles can change the final rendered result.

Reading the result

Read the result according to its color model, and check any alpha component before copying it into code. In RGB, each channel value controls the intensity of its respective red, green, or blue component. In HSL, hue runs around a color wheel, while saturation controls color intensity and lightness controls the balance between black and white.

Color syntax is strict when used in CSS or structured data. Common mistakes during manual editing include:

• omitting the leading hash from a hexadecimal CSS value;
• using five or seven hexadecimal digits, which are not valid standard hex lengths;
• placing percentages where an RGB implementation expects channel numbers;
• forgetting commas in legacy RGB syntax or mixing incompatible old and modern syntax;
• copying an alpha-enabled value into software that only accepts six-digit hex;
• using a decimal comma, such as 0,5, where CSS requires a decimal point, such as 0.5.

The picker generates color values rather than serving as a general CSS validator. It does not prove that a surrounding declaration, JSON document, or theme file is valid, so syntax errors outside the color value still need to be checked with the appropriate parser or development tool.

Worked color conversions

A six-digit hexadecimal color maps pairs of digits to red, green, and blue. For example, the following representations describe the same opaque color.

Hex value #336699

RGB equivalent rgb(51, 102, 153)

HSL equivalent hsl(210, 50%, 40%)

Three-digit hex is shorthand. Each digit is repeated to form a six-digit value.

Short hex value #fff

Expanded hex #ffffff

RGB equivalent rgb(255, 255, 255)

Eight-digit hex includes alpha after the red, green, and blue pairs. Be careful with systems that use a different channel order or do not accept eight-digit notation. A visually identical solid color can also produce a different result when opacity is applied over another background.

Which color format should I choose?

Choose the color notation already expected by the destination unless there is a clear reason to change it. Six-digit hex is compact and common in CSS variables and design token files. RGB is convenient when software exposes channel values directly, while HSL is useful for creating related colors by adjusting lightness or saturation.

• Use six-digit hex for an opaque web color when brevity and broad readability matter.
• Use eight-digit hex only when the target environment explicitly supports alpha in that notation.
• Use RGB or RGBA when working with individual red, green, and blue channels.
• Use HSL or HSLA for programmatic theme variations based on hue, saturation, or lightness.
• Use the Color converter when you already have a value and need to convert it rather than choose a new color visually.

Do not treat an on-screen RGB value as a print specification. Commercial printing may require CMYK values, an ICC color profile, proofing, and agreement with the printer. A mathematical conversion alone cannot guarantee that a printed color will match a backlit screen.

When is picking or converting a color unnecessary?

Picking or converting a color is unnecessary when the existing value is already in the format required by the destination. Repeated conversion can introduce rounding differences, inconsistent letter casing, or unnecessary changes to source files.

It may also be better to keep a named design token, such as a theme variable, instead of replacing it with a literal value. Tokens preserve the relationship between components and allow a color to be changed centrally. Likewise, a color used only by a machine does not need a more human-readable representation unless someone needs to inspect or maintain it.

No color picker can determine on its own whether a selection has sufficient contrast, matches a brand specification, or remains distinguishable for people with color-vision deficiencies. Check foreground and background combinations with a dedicated contrast tool, and inspect the interface in context.

Frequently asked questions

Can I use the result in CSS variables?

Yes, as long as the chosen notation is valid CSS for the browsers and build tools you support. Store the complete value in a custom property, then reference it with the var() function. If the project manipulates separate channels, it may be more convenient to store those channels according to the project's existing convention.

Why does the same color look different on another screen?

The same color can look different because displays vary in calibration, brightness, panel technology, and color-gamut support. Browser color management and the operating system's display profile can also affect rendering. A numeric match therefore does not guarantee an identical physical appearance on every device.

Do uppercase and lowercase hex letters change the color?

No. Hexadecimal digits A to F are case-insensitive, so #AABBCC and #aabbcc represent the same color. Follow the casing convention used by the repository to avoid formatting-only changes.

Can a color value contain accented or non-Latin characters?

No. Standard hexadecimal, RGB, and HSL notation uses ASCII digits, letters, and punctuation, so accented or non-Latin characters are not part of these numeric color syntaxes. They may appear in surrounding variable names or metadata if the relevant language and file encoding allow them.

Is a transparent color the same as no color?

No. A fully transparent color still has channel values, even though they are not visible on their own. Those hidden channels can matter during animation, interpolation, compositing, or later opacity changes, so preserve them when the application relies on that behavior.

Should I round decimal channel values?

Round decimal color channels and alpha values only to the precision accepted by the destination and needed for consistent output. Excessive precision makes values harder to review, while aggressive rounding can produce a small color difference. After rounding, check the rendered component against its intended background and interaction states.