Free Online Color Picker — HEX, RGB, HSL & CMYK from Images, Screen & Wheel

What Is an Online Color Picker?

An online color picker is a browser-based tool that identifies and captures the exact color value of any pixel — from an uploaded image, directly from your screen, or via a visual interface like a color wheel or RGB sliders. Web designers, UI developers, front-end engineers, brand managers, and photographers use color pickers daily to maintain brand consistency, match colors across tools, and build cohesive color palettes and design systems.

Color Code Formats Explained: HEX, RGB, HSL, HSV & CMYK

HEX color codes are the standard format in HTML and CSS. They encode red, green, and blue channels as two hexadecimal digits each, producing a compact 6-character code like #2563eb. RGB (Red Green Blue) expresses the same three channels as decimal numbers from 0–255 and is used natively in CSS with rgb() and rgba(). HSL (Hue Saturation Lightness) is more intuitive for designers — hue is the color angle on a wheel (0–360°), saturation is color intensity (0–100%), and lightness is how bright or dark the color is. HSV (Hue Saturation Value) is similar to HSL but uses Value instead of Lightness, making it closely aligned with how color wheel pickers work. CMYK (Cyan Magenta Yellow Key/Black) is the subtractive color model standard for print design.

Color Theory: How Color Harmonies Work

• Complementary — Two colors directly opposite on the color wheel. Creates maximum contrast and visual tension.
• Analogous — Three colors adjacent on the wheel. Creates calm, harmonious palettes common in nature.
• Triadic — Three colors equally spaced 120° apart. Offers vibrant variety while maintaining balance.
• Split-complementary — The base color plus the two colors flanking its complement. Softer than true complementary.
• Tetradic — Four colors forming a rectangle on the wheel. Rich and complex; needs careful balance.

WCAG 2.1 Color Contrast Requirements for Web Accessibility

The Web Content Accessibility Guidelines (WCAG) 2.1 require that text has sufficient contrast against its background so it can be read by people with low vision or color blindness. Level AA requires a 4.5:1 ratio for normal text and 3:1 for large text (18pt or 14pt bold). Level AAA requires 7:1 and 4.5:1 respectively. Always verify your text/background color pairs with the Contrast Checker tab before publishing any web content.

How to Pick a Color from an Image

To pick a color from an image, select the Image tab and upload any PNG, JPG, WEBP, GIF, or SVG file. The tool renders it on an HTML5 Canvas, letting you hover for a real-time magnified zoom lens preview and click any pixel to capture its exact color in all formats simultaneously. You can also extract the full color palette from the image using the Auto-extracted Palette feature, which applies a median-cut color quantization algorithm to identify the most dominant and representative colors.

How to Use the Screen Color Eyedropper

The screen color eyedropper uses the browser’s native EyeDropper API (supported in Chrome 95+ and Edge 95+) to sample any pixel anywhere on your screen — including other applications, desktop wallpapers, and browser content outside the tool. Click any Pick from Screen button and your cursor transforms into an eyedropper; hover over any color and click to capture it instantly as HEX, RGB, HSL, HSV, and CMYK values.

Color Picker Glossary

HEX Color Code

A 6-digit hexadecimal string (e.g., #2563eb) representing red, green, and blue channels. The standard format for CSS and HTML colors.

RGB (Red Green Blue)

A color model expressing colors as three integers (0–255) for red, green, and blue. Used natively in CSS with rgb() and rgba() for web colors.

HSL (Hue Saturation Lightness)

A human-friendly color model where hue is a degree (0–360°) on the color wheel, saturation is color intensity (0–100%), and lightness is brightness (0–100%).

CMYK (Cyan Magenta Yellow Key)

The subtractive color model used in print design. Colors are mixed from cyan, magenta, yellow, and black (key) inks.

WCAG Contrast Ratio

A numeric ratio (e.g., 4.5:1) defined by the W3C Web Content Accessibility Guidelines measuring text legibility against its background for users with visual impairments.

Color Palette Extraction

The algorithmic process of sampling image pixels to identify dominant representative colors, typically using median-cut or k-means quantization.

EyeDropper API

A browser Web API (Chrome/Edge 95+) that lets web applications sample the color of any pixel on the user’s screen, including outside the browser window.

Color Harmony

A set of colors that are aesthetically pleasing together based on their positions on the color wheel. Common types include complementary, analogous, triadic, split-complementary, and tetradic harmonies.