What is the difference between a tint and a shade?

A tint mixes a color with white to lighten it. A shade mixes it with black to darken it. The tints and shades generator produces 21 steps so you can pick a precise variant for backgrounds, hovers, or muted surfaces.

Which palette types are useful in design?

Complementary palettes use opposite hues for high contrast. Analogous palettes use neighbors for harmony. Triadic palettes use three evenly spaced hues for vibrant balance. Monochromatic palettes vary saturation and lightness within one hue.

What does the contrast checker compare against?

It compares two colors using the WCAG 2.1 contrast formula. AA passes need 4.5:1 for normal text or 3:1 for large text. AAA passes need 7:1 or 4.5:1 respectively.

Why does the same color look different across tools?

Each color space encodes the same perceived color through different numbers. Hex and RGB both describe sRGB triplets, while HSL reframes the same triplet around hue, saturation, and lightness. Conversion is lossless within sRGB.

Can the gradient tool produce CSS for legacy browsers?

It produces modern linear-gradient, radial-gradient, and conic-gradient syntax, supported in every browser released in the last several years. Vendor prefixes are no longer required for these properties.

How accurate is the contrast formula for printed material?

WCAG is designed for screen reading. Printed material uses different reflectance physics, and ink choices on uncoated stock fall outside the formula. Treat the checker as the standard for the web.

Are HSL values rounded?

Hue is shown to the nearest degree, saturation and lightness to the nearest percent. Internally, calculations use floating-point arithmetic, so round trips between hex and HSL are reliable.

Complete guide to color tools

What are color tools?

Color tools generate, convert, or evaluate color values for digital interfaces. The category here covers harmonious palette generation, tint and shade ramps, gradient builders, format conversion between hex, RGB, and HSL, and WCAG contrast checking for accessibility.

When to use them

Color decisions repeat across every design and development project.

Generating a brand palette from a single accent color picked out of a logo.
Producing 10 darker variants of a button color for hover, focus, and active states.
Building a CSS background gradient for a hero section without hand-writing the syntax.
Converting a hex code printed in a styleguide PDF into the HSL value a design tool expects.
Verifying that the body text on a card meets WCAG AA against the chosen background.
Lifting an exact color out of an inspiration image to use as a starting point.

Browser-based versus server-based

Color tools are interactive by nature: drag, click, drop. Running locally means the feedback loop matches a desktop design app. There is no server pause between picking a color and seeing the next swatch update.

Server-based color tools usually exist as part of larger platforms with shared palettes and team libraries. They earn their keep through collaboration features, not raw color math. For solo design work, picking from a screenshot, or sanity-checking a contrast ratio, the browser path is faster.

The math behind color conversion fits easily in a small JavaScript bundle. WCAG contrast, HSL conversion, and harmonic palette derivation are all closed-form formulas with no need for heavy backend libraries.

Tool comparison

Tool	Primary use	Output / options
Color palette generator	Build harmonious sets	Complementary, analogous, triadic, mono
Tints and shades	Light/dark variants	21 steps per base color
CSS gradient generator	Build CSS gradients	Linear, radial, conic
Color converter	Switch color formats	Hex, RGB, HSL with live preview
Contrast checker	WCAG compliance	AA/AAA pass/fail

Common workflows

Build a fresh brand palette. Pick a hue with image color picker from an inspiration image, expand the harmony with color palette generator, then derive ramps for each color with tints and shades.

Ship an accessible UI. Convert the brand hex to HSL with color converter, generate text and background pairs, then validate each pair using contrast checker against WCAG AA.

Style a hero section. Build the background with CSS gradient generator, sample the finished gradient in image color picker, and confirm overlay text passes contrast checker.

Color space primer

Web colors live in the sRGB color space. Hex notation packs three eight-bit channels into six hex digits. RGB notation uses the same three channels expressed as decimals from 0 to 255. HSL re-expresses the same color through hue (0 to 360), saturation (0 to 100 percent), and lightness (0 to 100 percent).

WCAG contrast measures relative luminance between two colors. The formula squares each channel, weights them per the human eye's sensitivity (green dominates), and ratios the results. A pure black on pure white pair gives 21:1, the maximum.

Modern CSS also supports OKLCH and Display P3 for wider gamuts. These are gaining adoption for designs that target newer hardware, but sRGB remains the interoperable baseline.

Color harmony groupings come from classical color theory. Complementary pairs sit opposite each other on the color wheel and provide strong visual contrast. Analogous sets pick neighbors of a base hue and feel calm and unified. Triadic sets place three colors at evenly spaced points (120 degrees apart) for vibrant balance. Monochromatic sets keep one hue and vary saturation and lightness only, producing a restrained palette that still provides enough difference to define interface layers.

Frequently asked questions

What is a color tool?: A utility that generates, converts, or evaluates color values. The category covers palette generation, tint and shade ramps, gradient builders, format conversion between hex, RGB, and HSL, plus WCAG contrast checking.
What is the difference between a tint and a shade?: A tint mixes a color with white to lighten it. A shade mixes it with black to darken it. The tints and shades generator produces 21 steps so you can pick a precise variant for backgrounds, hovers, or muted surfaces.
Which palette types are useful in design?: Complementary palettes use opposite hues for high contrast. Analogous palettes use neighbors for harmony. Triadic palettes use three evenly spaced hues for vibrant balance. Monochromatic palettes vary saturation and lightness within one hue.
What does the contrast checker compare against?: It compares two colors using the WCAG 2.1 contrast formula. AA passes need 4.5:1 for normal text or 3:1 for large text. AAA passes need 7:1 or 4.5:1 respectively.
Why does the same color look different across tools?: Each color space encodes the same perceived color through different numbers. Hex and RGB both describe sRGB triplets, while HSL reframes the same triplet around hue, saturation, and lightness. Conversion is lossless within sRGB.
Can the gradient tool produce CSS for legacy browsers?: It produces modern linear-gradient, radial-gradient, and conic-gradient syntax, supported in every browser released in the last several years. Vendor prefixes are no longer required for these properties.
How accurate is the contrast formula for printed material?: WCAG is designed for screen reading. Printed material uses different reflectance physics, and ink choices on uncoated stock fall outside the formula. Treat the checker as the standard for the web.
Are HSL values rounded?: Hue is shown to the nearest degree, saturation and lightness to the nearest percent. Internally, calculations use floating-point arithmetic, so round trips between hex and HSL are reliable.

Related concepts

WCAG contrast defines the accessibility thresholds used in the checker.
Color harmony covers the relationships behind complementary, analogous, and triadic schemes.
Alpha channel appears in gradient stops with rgba and hsla notation.
Image tools guide pairs with image-based color picking.
Developer tools guide covers the CSS surface where these colors land.

Reviewed and tested May 25, 2026.