Color Picker

Understanding Color Spaces

Color spaces are mathematical models that describe how colors can be represented. The three most common color spaces in web design and development are HEX, RGB, and HSL. Each has its strengths, and understanding them helps you make better design decisions.

HEX (Hexadecimal)

HEX is the most compact color format, widely used in CSS and HTML. It represents colors as a 6-digit hexadecimal number prefixed with #. Each pair of digits represents the red, green, and blue channels respectively, ranging from 00 (0) to FF (255). For example, #FF0000 is pure red, #00FF00 is pure green, and #0000FF is pure blue. A shorthand 3-digit format exists for colors where each pair consists of identical digits (e.g., #F00 equals #FF0000). HEX values are case-insensitive.

RGB (Red, Green, Blue)

RGB is an additive color model where colors are created by combining red, green, and blue light. Each channel ranges from 0 to 255, giving a total of over 16.7 million possible colors. In CSS, RGB colors are written as rgb(255, 0, 0). The modern rgb() syntax also supports an alpha channel for transparency: rgb(255 0 0 / 0.5) represents red at 50% opacity. RGB maps directly to how computer displays work, making it intuitive for developers who think in terms of red, green, and blue components.

HSL (Hue, Saturation, Lightness)

HSL is often considered more intuitive than RGB because it describes colors the way humans perceive them:

• Hue (0–360°): The base color on the color wheel. 0° is red, 120° is green, 240° is blue.
• Saturation (0–100%): The intensity or purity of the color. 0% is grayscale, 100% is fully saturated.
• Lightness (0–100%): How light or dark the color is. 0% is black, 100% is white, 50% is the pure hue.

HSL is excellent for creating color variations programmatically — you can adjust lightness to create hover states or generate entire color palettes by rotating the hue while keeping saturation and lightness constant.

Common Design Use Cases

• Brand colors: Store your brand's primary and secondary colors in HEX for consistency across your codebase.
• CSS custom properties: Define colors as HSL values in CSS variables to easily create light/dark mode variants by adjusting lightness.
• Dynamic theming: Use HSL with CSS calc() and custom properties to build dynamic color systems that can be adjusted at runtime.
• Accessibility: Use relative luminance calculations (derived from RGB values) to ensure sufficient color contrast ratios for WCAG compliance.
• Gradients: When creating gradients, HSL makes it easy to transition smoothly between hues.
• Design handoff: Provide colors in multiple formats so developers can use whichever format fits their workflow best.

Color Picking Tips

When choosing colors for your projects, consider the following best practices:

• Use the 60-30-10 rule: 60% dominant color, 30% secondary color, and 10% accent color for balanced designs.
• Generate palettes by rotating hue values in 30° or 60° increments for harmonious color schemes.
• Always check contrast ratios — body text should have at least a 4.5:1 contrast ratio against its background.
• Consider color blindness: approximately 8% of men have some form of color vision deficiency. Don't rely solely on color to convey information.
• Test your colors on different screens — colors can look very different depending on display calibration and technology.

Why Use Our Color Picker?

Our color picker gives you real-time conversion between HEX, RGB, and HSL formats. Adjust any slider and see all values update instantly. Click any value to copy it to your clipboard. Whether you're fine-tuning a brand palette, experimenting with color theory, or just need a quick hex code, this tool works entirely in your browser with no data sent anywhere.

💡 Pro Tips

• Pair with browser DevTools: Open Chrome DevTools (F12), go to any element's color property, click the color swatch to open the built-in picker, then use the eyedropper to sample any pixel on your screen — even outside the browser window. Use our tool alongside it to get instant conversions.
• Quick tints and shades: In HSL, keep H and S fixed and only change L — increase L for tints (lighter), decrease for shades (darker). This gives you perfect color variations without guessing.
• Complementary colors: Add or subtract 180 from the Hue value to get the exact opposite color on the wheel. For #2563EB (H=221), the complement is H=41 — a warm gold.
• Generate a full palette from one color: Pick your brand color, then rotate the Hue slider by 30° increments (analogous) or 120° (triadic) for harmonious palettes. For monochromatic schemes, fix Hue and Saturation, then vary Lightness in 10-15% steps. Each variation gives you a CSS-ready HSL value you can copy with one click.
• Paste any color format: Need to convert a color you already have? Use the native color picker — it accepts pasted HEX values. Or just drag the RGB sliders to match.
• CSS variable ready: Copy the HSL values and use them in CSS like --primary: 221 83% 53%, then reference as hsl(var(--primary)) — this lets you adjust opacity with hsl(var(--primary) / 0.5).

FAQ

How do I pick an accessible color palette that works for colorblind users?

Choose colors that differ in both hue AND lightness — not just hue. For example, red and green look identical to someone with deuteranopia (the most common form). A safer approach: pair a warm color (like orange) with a cool color (like blue), and ensure they have different lightness values. Use this tool's HSL sliders to check: if two colors have similar Lightness values, add at least 20-30% difference. For data visualizations, add patterns or labels as a fallback — never rely solely on color to distinguish categories. Tools like Coblis can simulate how your palette looks to users with different types of color vision deficiency.

How do I check if two colors have enough contrast?

WCAG 2.1 requires a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text (18px+ or 14px+ bold). The formula uses relative luminance derived from RGB values: L = 0.2126 * R + 0.7152 * G + 0.0722 * B (after gamma correction). You can use this tool's RGB output and plug values into any online contrast checker. For quick reference, pure black (#000000) on white (#FFFFFF) gives 21:1 — the maximum possible.

Why does my color look different on another screen?

Display calibration varies significantly between devices. sRGB (the web standard) covers about 35% of visible colors. Newer displays with P3 or Adobe RGB gamuts can show more vivid colors, causing the same hex code to look different. For web projects, stick to sRGB-safe values and always test on multiple devices.

What's the difference between HEX shorthand and full notation?

Shorthand HEX uses 3 digits where each is doubled: #F80 = #FF8800. It's a compact way to write colors where each channel's two hex digits are identical. Not all colors can be written in shorthand — only those where each RGB channel uses paired digits like 00, 33, 66, 99, CC, FF.

How do I use the picked color in my CSS or design tool?

Click any color value (HEX, RGB, or HSL) to copy it to your clipboard, then paste directly into your CSS file, Figma color picker, or Tailwind config. For CSS custom properties, the HSL format works best: define --brand: 221 83% 53% once, then use color: hsl(var(--brand)) everywhere — this lets you adjust opacity on the fly with hsl(var(--brand) / 0.8) without redefining the color.

How do I extract a color from a website or design mockup?

Open your browser's DevTools (F12), inspect the element, and copy the color or background-color value from the Styles panel. For screenshots or design files, use the native color picker above — click the color swatch, and most modern OS color pickers include an eyedropper tool that can sample any pixel on your screen. Paste the sampled color back into this tool to explore tints, shades, and complements.

How do I generate a Tailwind CSS color palette from a picked color?

Use the HSL sliders to build a Tailwind-style 50–950 shade scale. Start with your base color (usually the 500 or 600 shade). Keep the Hue fixed and adjust Lightness in ~5-10% increments — darker shades decrease Lightness (toward 0%), lighter shades increase it (toward 100%). For saturation, slightly increase it on lighter shades and decrease on darker ones to mimic how real pigments behave. Copy each HSL value as hsl(H S% L%) and paste directly into your Tailwind config under theme.extend.colors. This gives you full control over opacity with Tailwind's /<alpha> syntax without any build plugins.

How do I lighten or darken a color in CSS without guessing?

Convert the color to HSL, then adjust only the Lightness channel. For example, hsl(221, 83%, 53%) darkened by 15% becomes hsl(221, 83%, 38%). This is exactly how CSS color-mix(in oklab, ...) and tools like Tailwind generate their shade scales. With CSS custom properties you can do it dynamically: define --brand: 221 83% 53%, then use hsl(var(--brand)) for the base color and hsl(var(--brand) / 0.85) or a lightness-adjusted copy for hover states — no hex math required. Pick your base color in this tool, note the HSL values, and you can derive an entire light/dark scheme by shifting Lightness in consistent steps.