Color Converter & Palette Generator

What Is a Color Converter?

A color converter translates color values between HEX, RGB, HSL, HSV, and CMYK formats. It also generates complementary, analogous, and triadic color palettes, making it a quick reference for designers and developers working across different color systems.

Understanding Color Models

Designers and developers work with multiple color systems. HEX codes are the standard for web development — a 6-character hexadecimal string representing red, green, and blue channels (e.g., #FF5733). RGB (Red, Green, Blue) uses decimal values from 0–255 for each channel and is the native format for screens. HSL (Hue, Saturation, Lightness) describes colors more intuitively: hue is the color angle on the wheel (0–360°), saturation is the intensity (0–100%), and lightness is brightness (0–100%). This tool converts between all three instantly and lets you explore palettes for any base color.

Color Palette Strategies

Complementary palettes use colors opposite each other on the wheel (180° apart), creating maximum contrast — ideal for call-to-action buttons against backgrounds. Analogous palettes use neighboring hues (±30°), producing harmonious, low-contrast combinations common in nature photography and editorial design. Triadic palettes (120° apart) create vibrant, balanced designs. Split-complementary offers the contrast of complementary with more nuance. Monochromatic palettes vary only the lightness and saturation, ensuring guaranteed harmony. For converting other units, explore our full suite of conversion tools.

Tints, Shades, and Tones

A tint is a color mixed with white (higher lightness in HSL). A shade is mixed with black (lower lightness). A tone is mixed with gray (lower saturation). The strip below the palette shows 11 steps from the lightest tint to the darkest shade of your chosen color — click any swatch to copy its HEX code. This is useful for building UI color scales, accessible text pairings, and gradient backgrounds.

Web Accessibility and Contrast

WCAG 2.1 requires a minimum contrast ratio of 4.5:1 for normal text and 3:1 for large text. When choosing text and background colors, use the preview swatch at the top to eyeball readability. Dark text on light backgrounds (or vice versa) is usually safest. The luminance value determines whether black or white text is more readable on your chosen color — our preview adapts automatically.

Common Color Values Across Formats

Color Models in Professional Workflows

Different color models exist because different output media reproduce color through fundamentally different physical processes. RGB (Red, Green, Blue) is an additive model — it describes how light mixes on screens, where combining all three primaries at full intensity produces white. CMYK (Cyan, Magenta, Yellow, Key/Black) is subtractive — it describes how inks absorb light on paper, where combining all four at full density produces near-black. HSL (Hue, Saturation, Lightness) and HSV (Hue, Saturation, Value) are perceptual models that organize color the way humans think about it: what color is it (hue), how vivid is it (saturation), and how bright or dark is it (lightness/value). Converting between these models is a mathematical transformation, not a creative choice, and this calculator handles the conversion precisely.

Web developers primarily work in HEX (a compact representation of RGB) and RGB/RGBA (where A is the alpha channel for transparency). CSS now supports HSL natively, which makes programmatic color manipulation much easier: to lighten a color, increase lightness; to desaturate it, decrease saturation; to create a complementary color, add 180° to the hue. These operations are trivial in HSL but require complex math in RGB. Designers working in print must convert to CMYK before sending files to a printer, and colors that look vibrant on screen (especially bright blues and greens) often appear muted in CMYK because the printable color gamut is smaller than the screen gamut.

Building Accessible Color Palettes

Web Content Accessibility Guidelines (WCAG) require minimum contrast ratios between text and background colors: 4.5:1 for normal text and 3:1 for large text at Level AA, and 7:1 and 4.5:1 respectively at Level AAA. Contrast ratio is calculated from the relative luminance of two colors, which depends on their RGB values transformed through a gamma curve. A common mistake is judging contrast by visual appearance alone — some color combinations that look distinct to people with typical vision fail contrast requirements and are difficult or impossible to read for people with color vision deficiencies. Approximately 8% of males and 0.5% of females have some form of color vision deficiency, making accessible design a practical necessity rather than an edge case.

When building a color palette for a website or application, start with a primary brand color and derive the rest systematically. Use HSL to generate lighter tints (increase lightness) for backgrounds and darker shades (decrease lightness) for hover states. Create analogous colors by shifting hue ±30° for harmonious combinations, or complementary colors by shifting 180° for high-contrast accents. Triadic schemes (three colors spaced 120° apart on the color wheel) provide visual variety while maintaining balance. Test every combination against WCAG contrast requirements and simulate how the palette appears under protanopia, deuteranopia, and tritanopia to ensure usability for all visitors.

Color Spaces Beyond the Basics

Professional color management uses color spaces like sRGB, Adobe RGB, and Display P3 that define exactly which colors a model can represent. sRGB is the web standard and the default for most monitors. Display P3, used by modern Apple devices, covers approximately 25% more colors than sRGB, particularly in greens and reds. Adobe RGB extends into cyan-green territory and is preferred for print preparation. When a color exists in one space but not another, it must be mapped to the nearest reproducible color — a process called gamut mapping that can shift hues unexpectedly if not managed carefully.

The CIELAB (L*a*b*) color space was designed so that equal numerical changes correspond to roughly equal perceived changes in color, which RGB and CMYK do not achieve. Two colors that are 10 units apart in L*a*b* look about equally different regardless of where in the spectrum they fall. This property makes L*a*b* the standard for industrial color matching, paint formulation, and quality control where quantifying color difference (ΔE) is essential. A ΔE of 1.0 is considered the just-noticeable difference for most observers, and manufacturing tolerances typically require ΔE < 2.0 for consistency.

Color in User Interface Design

Modern design systems build entire component libraries from a single primary color by generating systematic variations. Material Design, for example, generates a palette of 10 tones (from near-white to near-black) for each color using perceptually uniform steps in the HCT (Hue-Chroma-Tone) color space. This approach ensures that colors at the same tone level have consistent visual weight across different hues — a principle that RGB and even HSL do not guarantee because their lightness values do not correspond linearly to perceived brightness. Blue appears darker than yellow at the same HSL lightness value because the human eye is more sensitive to green-yellow wavelengths.

Dark mode design requires more than inverting colors. Simply switching white backgrounds to black and black text to white produces excessive contrast that causes eye strain. Best practice uses dark gray (#121212 or similar) rather than pure black, and light gray (#E0E0E0) rather than pure white, achieving sufficient contrast (typically 15.8:1 or higher) without the harshness of maximum contrast. Accent colors in dark mode need desaturation — a vivid blue (#2196F3) that works on white backgrounds becomes visually jarring on dark backgrounds and should be shifted toward a less saturated variant (#82B1FF). This calculator helps identify the HSL adjustments needed: reduce saturation by 15-25% and increase lightness by 10-20% when adapting brand colors for dark mode.

See also: Paint Color Mix Calculator · Number Base Converter · Pixel to Inches Converter · Percentage Calculator · Temperature Converter · Data Storage Converter · Random Number Generator