What is a Color Picker?
A color picker is a tool that lets you visually select a color and instantly see its value in multiple color formats used in web design and development. Different contexts require different color formats: HTML/CSS traditionally uses HEX codes (#3b82f6), CSS functions accept rgb() and hsl(), and design software often works with HSV.
Understanding the relationship between color formats helps you build more systematic and maintainable design systems. HSL is particularly useful for color manipulation in CSS because the Hue (0–360°), Saturation (0–100%), and Lightness (0–100%) are intuitive — you can create tints by increasing lightness and shades by decreasing it.
FAQ
What is the difference between HSL and HSV?
Both use Hue and Saturation. The difference is in the third component: HSL uses Lightness (0% = black, 50% = pure color, 100% = white), while HSV uses Value/Brightness (0% = black, 100% = full brightness). HSL is generally more intuitive for web design, while HSV is common in design tools like Photoshop.
Which color format should I use in CSS?
Use HEX for quick one-off colors and for copying from design tools. Use HSL in design systems where you need to programmatically manipulate colors (e.g., creating hover states by adjusting lightness). Modern CSS also supports oklch() for perceptually uniform color manipulation.