HEX (hexadecimal) is the most common color format in web development, representing colors as a six-digit code preceded by a hash sign (e.g., #2563eb). Each pair of digits defines the red, green, and blue channels in base-16, with values ranging from 00 (0) to FF (255). RGB (Red, Green, Blue) uses the same additive color model but expresses each channel as a decimal number from 0 to 255 (e.g., rgb(37, 99, 235)). HSL (Hue, Saturation, Lightness) takes a more intuitive approach: hue is a degree on the color wheel (0-360), saturation is the color's intensity as a percentage, and lightness controls how bright or dark it appears. HSL is often preferred by designers because adjusting a single value predictably shifts the color.
Color theory provides the principles for combining colors effectively. The color wheel organizes hues in a circle, making it easy to identify complementary colors (opposite on the wheel, creating high contrast), analogous colors (adjacent on the wheel, creating harmony), and triadic colors (equally spaced, creating vibrant palettes). In web design, color choices affect readability, accessibility, and emotional response. The WCAG accessibility guidelines recommend a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text to ensure your content is readable for users with visual impairments.
Web developers and designers use color picker tools to find the perfect colors for CSS stylesheets, design systems, brand guidelines, and UI components. This tool lets you pick a color visually or enter it in any format and instantly see the HEX, RGB, and HSL equivalents -- no manual conversion needed. Use the sliders to fine-tune individual red, green, and blue channels, or adjust colors directly via the native color picker. It is ideal for creating consistent color palettes, converting between formats for different tools and frameworks, and ensuring precise color reproduction across your projects.