Free Color Tools — Palettes, Gradients, Contrast & CSS Export
Color Tools on Apex Toolz gather palette generators, gradient builders, contrast checkers, shade scales, and format converters in one category tuned for UI designers and front-end developers.
About this category
Sample colors from photos, build harmonious palettes, export CSS custom properties, and validate WCAG contrast before shipping buttons and form labels. Mesh and linear gradient tools output production-ready CSS for hero sections and landing pages.
Hex, RGB, and HSL converters resolve handoff mismatches between Figma inspect panels and code. Color blindness simulation previews how palettes appear to protanopia and deuteranopia users — catching red-green failures before launch.
This category overlaps Developer Tools (which also includes URL and favicon utilities) but focuses exclusively on color science and CSS color output. Development Tools on Explore adds layout and token scaffolding separately.
Featured color utilities below are the fastest paths from brand reference to deployable CSS.
Dark mode doubles palette work — shade generators produce paired scales so light and dark surfaces stay harmonious without reinventing hex per theme toggle.
Brand refresh projects often start with Extract Colors From Image on the new logo, then expand to full semantic tokens for success, warning, and error states.
Designers working in OKLCH or LCH should still validate hex exports in target browsers — Color Tools bridge formats but rendering pipelines differ between Safari and Chrome for wide-gamut displays.
State colors for hover and active buttons need darker shades from the same hue family — do not reuse base fill without shade generator adjustment.
Data visualization palettes need distinct hues for series — extend generated palette with Color Shade Generator steps per chart color.
Why use these tools
Random hex picking produces inaccessible UI — contrast and shade tools enforce systematic scales instead of one-off guesses.
Marketing microsites need on-brand gradients without opening a desktop design suite on a locked laptop.
Extracting palette from client logo JPG accelerates Tailwind extend config during sprint zero.
Copy-paste CSS variables beats screenshotting swatches into Slack threads that drift from production.
Color blindness simulation catches UI states that rely on red/green alone — pair with iconography in design reviews.
Hex to RGB converters resolve disputes when Android inspect shows 8-digit hex with alpha and iOS designers use separate opacity sliders.
Brand guidelines PDFs often lag code — generators let engineering ship accessible UI while design catches up on formal token docs.
Featured tools
Palette Generator
Extract a balanced dominant-color palette from any image for UI and brand work.
Contrast Checker
WCAG contrast ratios with AA/AAA pass indicators for text and UI.
Gradient Pro
Linear, radial, conic & repeating CSS gradients with live preview and PNG export.
Shade Generator
Generate a full 50–900 tint/shade scale from one brand hex color.
Theme Builder
Compose primary, accent, and surface tokens with live preview and CSS export.
HEX to RGB
Convert hex color codes to RGB values for CSS and design tools.
Mesh Gradient
Build modern multi-blob mesh gradients for hero sections and landing pages.
Image Colors
Pull UI and brand colors from screenshots while filtering browser chrome.
Tool categories
Design Color Tools
Featured pickers, palettes, gradients & design systems
Color Picker Pro
Precision eyedropper — click any image to sample hex, RGB and build a swatch list.
Palette Generator
Extract a balanced dominant-color palette from any image for UI and brand work.
Gradient Pro
Linear, radial, conic & repeating CSS gradients with live preview and PNG export.
Mesh Gradient
Build modern multi-blob mesh gradients for hero sections and landing pages.
Shade Generator
Generate a full 50–900 tint/shade scale from one brand hex color.
Contrast Checker
WCAG contrast ratios with AA/AAA pass indicators for text and UI.
Image Colors
Pull UI and brand colors from screenshots while filtering browser chrome.
Website Colors
Scan a live URL for theme-color and meta tag hex values.
+ 2 more in this group — browse explore
CSS Color Utilities
Gradients, converters & color blindness preview
Color Blindness
Preview images under protanopia, deuteranopia, and tritanopia simulations.
HEX to RGB
Convert hex color codes to RGB values for CSS and design tools.
RGB to HEX
Convert RGB color values to hex codes for web and UI design.
HEX to HSL
Convert hex colors to HSL for modern CSS hsl() syntax.
CSS Gradient
Build linear and radial CSS gradients with live preview.
Common workflows
Accessible UI palette
From brand hex to WCAG-safe pairs.
- 1Enter primary brand color in Color Shade Generator for 50–900 scale.
- 2Test text/background pairs in Color Contrast Checker at real font weights.
- 3Adjust secondary accent if AA fails on small labels.
- 4Export :root block from Theme Builder Studio.
- 5Document pairs in Storybook or design system README.
Hero gradient from marketing photo
Match landing page to campaign imagery.
- 1Upload campaign photo to Color Palette Generator or Extract Colors From Image.
- 2Pick dominant hues for Gradient Generator Pro stops.
- 3Tune angle and stop positions with live preview.
- 4Copy CSS into hero section module.
- 5Compress hero background photos separately in Image Tools.
Handoff fix between design and code
When inspect values disagree with implementation.
- 1Convert disputed hex to RGB and HSL with converter tools.
- 2Compare against Figma token export line-by-line.
- 3Update CSS variables to single canonical hex per token.
- 4Re-run contrast check on updated button styles.
- 5Close ticket with exported CSS snippet attached.
Dark mode token fork
Extend light theme to dark surfaces.
- 1Duplicate light :root tokens from Theme Builder Studio export.
- 2Adjust background and surface shades — do not invert hue blindly.
- 3Re-run Color Contrast Checker on primary buttons in dark context.
- 4Test mesh gradients at reduced saturation for OLED power and banding.
- 5Ship prefers-color-scheme media query with both token sets documented.
Helpful tips
- Contrast ratios depend on font size and weight — test body and caption separately.
- Limit active accent colors on one screen — palette generators offer many hues; restraint sells.
- Mesh gradients are CSS-heavy — test performance on low-end Android devices.
- Extract Colors From Website fetches public URLs only — respect robots when auditing competitors.
- Pair with Developer Tools favicon generators after brand colors stabilize.
- SEO Social Preview Studio needs 1200×630 art — color tools do not replace share image design.
- Document token naming conventions (semantic vs primitive) in your design system README when exporting from generators.
- Test gradient text accessibility — gradient fills on small type often fail contrast even when solid swatches pass.
- Neutral grays should lean slightly warm or cool — pure #808080 neutrals feel lifeless on large dashboard surfaces.
Explore further
Related categories
Developer Tools
Developer Tools on Apex Toolz cover color systems, brand asset generation, URL utilities, and handoff-friendly exports for front-end and design workflows.
SEO Tools
Apex Toolz SEO Tools span image SEO, web meta generators, live preview checkers, and YouTube character-limit utilities for publishers and developers.
Image Tools
Apex Toolz Image Tools cover format conversion, compression, resizing, cropping, metadata, and batch workflows — all in your browser without uploading files to a server.
Social Media Tools
Social Media Tools cover YouTube creator utilities, thumbnail design QA, Instagram grids and carousels, platform-specific resizers, and profile picture exports.
Frequently asked questions
Summary
Color Tools deliver palettes, gradients, converters, contrast validation, and CSS exports for modern product design — locally in the browser without design SaaS accounts.
Follow accessible palette, hero gradient, and handoff workflows to reduce rework. Featured tools include Color Palette Generator, Color Contrast Checker, and Gradient Generator Pro.
Visit Developer Tools for URL and favicon utilities, Image Tools when sampling from compressed photos, and SEO Tools when publishing pages using your finalized color system.
Color is infrastructure — treat exported tokens like API contracts. Color Tools help you ship palettes that are beautiful, accessible, and copy-paste ready for engineering handoff.
Rebrand projects should snapshot old tokens before overwrite — diff CSS exports in git when migrating from legacy hex spreadsheets to generator output.
Focus ring colors need contrast against both light and dark surfaces — test keyboard focus states separately from default button fills.
Ship color tokens before component refactors — changing hex after fifty components exist costs more than one afternoon in Theme Builder Studio.