RSK World - Color Theme Generator | Free Palette Tool, CSS SCSS JSON Tailwind Export | RSK World

Color Theme Generator free palette tool: theme colors, presets, export CSS SCSS JSON Tailwind, WCAG contrast, RSK World

Color Pickers Export Formats WCAG & Harmony Presets & Scale Vanilla JS

Color Theme Generator is a free online tool to create custom color themes and palettes for web and UI design. Six theme colors: Primary, Secondary, Accent, Background, Surface, Text—each with native color picker, hex display, and lighten/darken (±10% HSL). Eight presets: Ocean, Forest, Sunset, Midnight, Rose, Lavender, Coral, Mint; plus Random theme and Restore previous. Primary tint/shade scale 50–900; gradient preview Primary to Accent. WCAG accessibility: contrast ratio for text-on-background and primary-on-background with AA/AAA pass or fail. Color harmony from primary: complementary (180°), analogous (±30°), triadic (120°); color-theory.html explains each. Export as CSS custom properties, SCSS map, JSON, or Tailwind theme.extend.colors; copy or download. Save themes by name in localStorage; load or remove; import from pasted or uploaded JSON. Live preview with light/dark mode toggle. Keyboard shortcuts: R random, S save, ? help. Pure HTML5, CSS3, Vanilla JavaScript; no build step. Files: index.html, color-theory.html, styles.css, script.js, js/color-utils.js, js/theme-storage.js, js/tint-shade.js, js/keyboard-shortcuts.js. © 2026 RSK World.

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Theme Colors & Pickers

Six theme colors: Primary, Secondary, Accent, Background, Surface, Text. Native color input with live hex display; plus/minus buttons lighten or darken 10% via HSL in color-utils.js. Click any hex value or scale swatch to copy to clipboard. script.js getTheme(), setTheme(), applyTheme() inject values into :root CSS variables for instant preview.

CSS variables: --primary, --secondary, --accent, --background, --surface, --text, --radius, --shadow in :root
script.js getTheme() reads all six inputs; setTheme() updates inputs and hex spans; applyTheme() sets documentElement style
Copy-hex: .copy-hex click copies hex from data-hex or element text; toast feedback
Adjust buttons: ColorUtils.lighten(hex,10) and darken(hex,10) in js/color-utils.js
Font Awesome 6 (CDN) for fill-drip, swatchbook, universal-access, palette, save, keyboard icons
Color grid: responsive grid layout; each color has label, picker, hex span, −/+ controls
Hex hint text: "Click any hex value to copy. Use +/− to lighten/darken."

Project Structure & Files

index.html: main generator UI, shortcuts modal, theme colors, scale, accessibility, harmony, gradient, preview, save/load/import, export tabs. color-theory.html: complementary, analogous, triadic, WCAG contrast reference. styles.css: :root variables, header, controls, scale strip, contrast cards, harmony, gradient, preview light/dark, import/save chips, export tabs, footer, responsive. script.js: presets, get/set theme, export formats, contrast, harmony, gradient, scale, copy-hex, adjust, save/load/import, shortcuts. js/color-utils.js, theme-storage.js, tint-shade.js, keyboard-shortcuts.js. No build; open index.html.

index.html: single-page generator; color-theory.html: standalone theory guide with back link
Script order: color-utils.js → theme-storage.js → tint-shade.js → keyboard-shortcuts.js → script.js (dependencies first)
styles.css: max-width 960px, Segoe UI/system-ui fonts, CSS variables drive entire theme
No npm, webpack, or build step—vanilla HTML5, CSS3, JavaScript only
README.md: file list, features, usage, license, SEO note, project info
LICENSE + LICENSE.txt: MIT © 2026 RSK World
All pages: meta title, description, keywords, canonical, Open Graph, Twitter Card, theme-color, JSON-LD

Presets & Live Preview

Eight presets: Ocean, Forest, Sunset, Midnight, Rose, Lavender, Coral, Mint; Custom and Random; Restore previous (undo). Live preview: sample card (heading, paragraph, primary/secondary/accent buttons) and list; Dark/Light toggle via .preview-light. Gradient strip: linear gradient Primary to Accent. Primary scale 50–900: TintShade.scaleFromBase() builds lightness ladder; each cell click copies hex.

Presets object in script.js: ocean, forest, sunset, midnight, rose, lavender, coral, mint with full hex palettes
setTheme(preset) applies colors and updateAll(); setPresetActive(name) highlights .preset-btn.active
Random: ColorUtils.randomHex() per color; Restore previous: previousTheme stored before each setTheme
Live preview: .preview-card (h3, p, .btn-primary/.btn-secondary/.btn-accent), .preview-list ul
.preview-light: overrides background #f8fafc, dark text; preview-mode-btn toggles label Dark/Light
Gradient: gradient-strip style.background = linear-gradient(90deg, primary, accent)
Scale: scaleKeys [50,100..900]; scaleFromBase(primary) returns {50:hex..900:hex}; 500 = base primary
Scale cells: .scale-cell.copy-hex with data-hex; click copies that hex

Export & Save / Import

Export: CSS (:root { --primary: #hex; ... }), SCSS ($theme map + :root with map-get), JSON (pretty theme object), Tailwind (theme.extend.colors). Copy to clipboard or download (theme-timestamp.css/.scss/.json/.js). Save: name + theme in localStorage key rskworld-color-theme-generator-saved. Load/remove from saved chips. Import: paste JSON in textarea or choose .json file; validates primary, secondary, accent, background, surface, text as 6-digit hex.

getExportContent(theme, format): css/scss/json/tailwind; comment "Theme - RSK World https://rskworld.in © 2026"
Export tabs: .export-tab[data-format]; getCurrentFormat() drives css-code content; Copy uses navigator.clipboard
Download: Blob + URL.createObjectURL; extension .css/.scss/.json/.js by format; filename theme-{Date.now()}
ThemeStorage (theme-storage.js): list() returns [{name, theme, updated}]; save(name, theme) upserts; load(name) returns theme; remove(name) filters out
Saved list: renderSavedList() builds .saved-chip with Load (data-load) and Remove (data-remove) buttons; escapeHtml for names
Import tryImport(obj): only accepts 6-digit hex for each colorIds key; setTheme(theme, false) and clear textarea/file input
Import from file: FileReader readAsText; JSON.parse; invalid shows alert; file input reset to allow re-import

Accessibility & Color Harmony

WCAG: contrast ratio for Text on Background and Primary on Background; display X:1 and badge AA (≥4.5:1), AAA (≥7:1), or Fail. Color harmony derived from Primary: complementary (180° hue), analogous (±30°), triadic (120°); each with swatch and hex. color-theory.html: explains complementary, analogous, triadic and WCAG AA/AAA. ColorUtils: relativeLuminance, contrastRatio, complementary, analogous(hex, 30), triadic.

updateContrast(theme): ColorUtils.contrastRatio(text, background) and (primary, background); set() writes ratio and status el
Contrast status classes: .pass-aaa (≥7), .pass-aa (≥4.5), .fail; green/red badges
updateHarmony(theme): complementary one swatch; analogous two spans ±30°; triadic two spans +120° +240°
color-utils.js: parseHex, rgbToHsl, hslToRgb, rotateHue; complementary = hue+180; triadic = +120, +240
color-theory.html: theory-card sections with swatch rows; back link to index.html; same styles.css variables
Semantic HTML: header role=banner, main role=main, section aria-labelledby, footer role=contentinfo
ARIA: aria-label on color inputs, adjust buttons, preview toggle; shortcuts modal aria-hidden, aria-labelledby

What You Get

Full source: index.html (generator), color-theory.html (theory), styles.css, script.js, js/color-utils.js, js/theme-storage.js, js/tint-shade.js, js/keyboard-shortcuts.js, README.md, LICENSE, LICENSE.txt. No build; open index.html in any modern browser. HTML5, CSS3, Vanilla JavaScript; optional Font Awesome 6 CDN. MIT License © 2026 RSK World. Free for learning and commercial use.

Complete editable source: all HTML, CSS, and JavaScript included; no minified or bundled files
No Node, npm, or build step—run by opening index.html or serve via any static server
README.md: features list, file-purpose table, usage steps, SEO note, technologies, project info, contact
Dual license files: LICENSE (full MIT), LICENSE.txt (summary + contact); RSK World, Molla Samser
Technologies: CSS custom properties, native color input, vanilla JS IIFE modules, localStorage
Category: Dark Mode & Themes; Difficulty: Intermediate; Author & contact in README
Suitable for: learning color systems, WCAG, design tokens, export pipelines, portfolio projects

Usage

Open index.html in a browser. Choose a preset (Ocean, Forest, etc.) or Random; or pick each color. Use +/− to lighten/darken; click hex to copy. Review Accessibility (contrast AA/AAA) and Color harmony (complementary, analogous, triadic). Toggle Live preview Dark/Light. Save theme with a name; Load or remove from Saved. Export: select CSS/SCSS/JSON/Tailwind tab, then Copy or Download. Import: paste JSON or upload .json file. Open color-theory.html for complementary, analogous, triadic and WCAG. Shortcuts: R random, S save, ? shortcuts help, Esc close.

Step 1: Open index.html (or deploy and open URL); no server required for core features
Step 2: Pick preset or Random; tweak with color inputs and +/−; click hex/scale cells to copy
Step 3: Check contrast and harmony; switch Live preview to Light if designing for light backgrounds
Step 4: Save theme (name + Save); later Load from chip or Remove; Import from JSON paste or file
Step 5: Export: choose format tab, Copy to clipboard or Download file; use in your CSS/SCSS/Tailwind/JSON pipeline
color-theory.html: read from same folder; Back to Generator link returns to index.html
Keyboard: R (random), S (save dialog), ? (shortcuts modal), Esc (close modal); ignored in input/textarea

Project Features

Full feature set: six theme color pickers with hex display and lighten/darken; eight presets plus Custom, Random, Restore previous. Primary tint/shade scale 50–900 (click to copy); gradient strip Primary→Accent. WCAG contrast for text and primary on background (AA/AAA/Fail). Color harmony: complementary, analogous ±30°, triadic. Export: CSS variables, SCSS map, JSON, Tailwind theme.extend.colors—copy or download. Save/load by name in localStorage; import from paste or file. Live preview with light/dark toggle. Keyboard: R, S, ?, Esc. Dedicated color theory page. 100% vanilla JS.

Theme colors: Primary, Secondary, Accent, Background, Surface, Text—picker + hex + −/+ per color
Presets: Ocean, Forest, Sunset, Midnight, Rose, Lavender, Coral, Mint; Random; Restore previous
Scale: 50–900 from Primary via TintShade; gradient strip; both update on theme change
Accessibility: two contrast cards with ratio and AA/AAA/Fail; harmony section with three relationship types
Export: four formats; Copy (clipboard) and Download (timestamped file); tab switches format
Persistence: ThemeStorage list/save/load/remove; import validates and applies theme from JSON
UX: copy-toast on hex copy; shortcuts modal; Esc and backdrop close; no focus trap in modal

Credits & Acknowledgments

Color Theme Generator is created and maintained by RSK World. Free interactive tool for custom color palettes, live preview, export to CSS SCSS JSON Tailwind, WCAG contrast checking, and color harmony (complementary, analogous, triadic). Built with vanilla JavaScript; no frameworks or build step. Intended for learning, prototyping, and production theme workflows.

Color Theme Generator: free palette and theme export tool for web and UI designers
RSK World – Project creator, educational platform, and free programming resources
Author: Molla Samser (Founder, RSK World); contact: help@rskworld.in, support@rskworld.in, info@rskworld.com
Phone: +91 93305 39277; Address: Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147
Website: https://rskworld.in; Contact page: https://rskworld.in/contact.php
© 2026 RSK World. Free Programming Resources & Source Code. MIT License.

Support & Contact

For Color Theme Generator customization, integration into your stack, or questions about palette export and WCAG contrast, contact RSK World. We offer technical support and welcome feedback and feature requests for this free tool.

Email: help@rskworld.in | support@rskworld.in | info@rskworld.com
Phone: +91 93305 39277
Website: rskworld.in – Free Programming Resources & Source Code
Address: Nutanhat, Mongolkote, Purba Burdwan, West Bengal, India, 713147
Author: Molla Samser (Founder, RSK World)
Documentation: README.md (features, files, usage, license)
Technical support and customization help available
Suggestions and UI/UX tool requests welcome

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Download Color Theme Generator

Get the complete Color Theme Generator source code: HTML, CSS, and JavaScript for custom palettes, CSS SCSS JSON Tailwind export, WCAG contrast, and color harmony. View files in browser or download the project directly. No build required—open index.html to run. Free by RSK World.

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