Frequently Asked Questions

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Different color formats serve different purposes. RGB (Red, Green, Blue) is based on additive light mixing and is the native format for digital screens. HEX is simply a hexadecimal representation of RGB values, commonly used in web development for its compact syntax. HSL (Hue, Saturation, Lightness) is designed to be more intuitive for humans when adjusting colors. Use our Color Converter to easily switch between formats, or try specific converters like HEX to RGB or HEX to HSL.

Use RGB when you need to manipulate color values in code or animate them: separate numbers are easier to calculate and interpolate in JavaScript. HEX is preferred for static CSS stylesheets due to its compact format. Both can carry transparency: rgba() in RGB, or 8-digit #RRGGBBAA in HEX. Both represent the same colors — convert between them instantly with our RGB to HEX or HEX to RGB converters.

The color itself doesn't actually look different — it's just represented differently. HEX shows the color as a hexadecimal code (e.g., #FF5733), while HSL describes it using Hue (0-360°), Saturation (0-100%), and Lightness (0-100%). The visual appearance is identical; only the notation changes. You can verify this using our HEX to HSL converter — the preview will show the exact same color.

HSL makes color manipulation intuitive. Want a lighter version? Just increase Lightness. Need more vibrant? Increase Saturation. The Hue stays constant, so the color family stays the same. This is handy for hover states and dark/light themes. HSL Lightness is not perceived lightness, though: a yellow and a blue at the same L can differ a lot in brightness, so check the contrast of each variation rather than relying on L alone. Convert your colors to HSL using our HEX to HSL or RGB to HSL converters.

Palette generators save hours of manual work by automatically creating harmonious color combinations based on color theory. They're essential for branding, UI design, and ensuring visual consistency across your project. Our Color Palette Generator supports 8 palette types: six harmonies (monochromatic, analogous, complementary, split complementary, triadic and tetradic) plus tints and shades.

Good color palettes follow established harmony rules: complementary colors (opposite on the color wheel), analogous (adjacent colors), triadic (three evenly spaced), etc. Beyond harmony, check contrast ratios for accessibility using our WCAG Contrast Checker. Generate harmonious palettes automatically with our Palette Generator.

A solid color is a single, uniform color value. A gradient smoothly transitions between two or more colors, creating depth and visual interest. Gradients can be linear (straight line), radial (circular), or conic (angular). Create beautiful CSS gradients with our Gradient Generator — it makes linear, radial and conic gradients with live preview and CSS code output.

For most use cases, yes. CSS gradients are resolution-independent (always sharp), lightweight (no file download), and easy to modify. Animating one takes extra CSS (for example @property or a moving background-position), because a gradient cannot be transitioned directly. They also reduce HTTP requests and improve page performance. Create optimized CSS gradients with our Gradient Generator — just pick colors, adjust angles, and copy the CSS code.

Good contrast isn't just about meeting WCAG standards — it directly impacts user experience. Low-contrast text can be slower and more tiring to read for everyone, not just people with visual impairments, and it gets harder still in bright light or on a dim screen. Check your color combinations with our Contrast Checker.

Contrast checkers use the WCAG 2.x formula (the same in WCAG 2.0, 2.1 and 2.2), which calculates relative luminance of both colors and produces a ratio (e.g., 4.5:1). For normal text, WCAG requires at least 4.5:1 (AA level) or 7:1 (AAA level). Large text needs only 3:1 (AA) or 4.5:1 (AAA). Our Contrast Checker shows the ratio with AA/AAA pass or fail for normal and large text, the 3:1 check for UI components and graphics, and fix suggestions with the nearest passing color.

Color naming isn't standardized across systems. CSS defines 148 named colors (like "coral" or "tomato"), but other systems (Pantone, RAL, paint manufacturers) use different names. Even similar colors may have completely different names. Within CSS itself some values have two names: aqua and cyan, fuchsia and magenta, and gray and grey (in every gray name). Our Color Identifier recognizes the format of a value and shows its CSS name only when the color matches one of the 148 exactly.

For screen work, yes: the conversions use standard formulas (the culori library). An automated check confirms each converter's own examples, and the Pantone, Tailwind and color-blindness simulator data are compared with reference values. For print and for brand inks, treat CMYK and Pantone values as approximations and confirm them with your printer or a physical guide (see How We Calculate). CMYK is the plain formula without a print profile. Contrast follows the WCAG formula. Try our Color Converter, Palette Generator, or Contrast Checker for your next project.

CMYK (Cyan, Magenta, Yellow, Key/Black) is a subtractive color model used for print. Unlike RGB which mixes light, CMYK mixes inks. Colors often look different when printed because monitors use RGB while printers use CMYK. If you're designing for print, convert your colors to CMYK using our HEX to CMYK or RGB to CMYK converters as a starting point. They use the simple formula without a print profile, so for a print job ask your printer for values from their profile.

OKLCH and OKLAB are modern, perceptually uniform color spaces. Unlike RGB or HSL, they are designed so that equal numeric changes produce approximately equal perceived color differences. This makes them ideal for creating smooth gradients, accessible color palettes, and programmatic color manipulation. Modern browsers support these formats natively. Convert your colors with our HEX to OKLCH or HEX to OKLAB converters.