What is OmniConverter?

OmniConverter is a free online converter suite with professional-grade tools for unit conversion across 20+ categories, color design tools (palette generator, gradient maker, color picker), 200+ Google Fonts browser, image compression and conversion (17 tools), PDF tools, text utilities (case converter, word counter, diff checker), technology history timelines, and news coverage across 7 sections.

Is OmniConverter free to use?

Yes, all OmniConverter tools are completely free. No sign-up, no account, no subscription required. Just open and convert.

Does OmniConverter support multiple languages?

Yes, OmniConverter is available in 8 languages: English, Spanish, French, German, Chinese, Japanese, Hindi, and Arabic. Blog posts are in English only.

What unit conversions does OmniConverter support?

OmniConverter supports 20+ unit categories including length, weight, temperature, area, volume, speed, time, currency, digital storage, pressure, energy, power, force, frequency, angle, fuel consumption, shoe size, clothing size, ring size, and more. All conversions use exact factors with live currency rates.

What color tools does OmniColors offer?

OmniColors includes 9 free color tools: Color Palette Generator with 6 harmony modes, CSS Gradient Maker (linear/radial/conic), Color Picker & Converter (HEX/RGB/HSL/CMYK), Color Mixer & Blender, WCAG Contrast Checker, Color Names Database with 250+ named colors, Hex Color Clock, Color Converter, and Palette from Image extractor.

Is OmniColors free to use?

Yes, all OmniColors tools are completely free with no usage limits. No sign-up or account is required. Everything runs client-side in your browser.

Is my color data private?

Absolutely. All color processing happens locally in your browser. No color data, images, or palettes are ever sent to a server.

What color formats are supported?

OmniColors supports HEX, RGB, RGBA, HSL, HSLA, CMYK, and HSB color formats. The Color Palette Generator exports as HEX, CSS custom properties, or PNG image.

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OmniColors, デザイナーと開発者のための無料オンラインカラーツール

世界中のデザイナー、開発者、アーティストが使用するプロ仕様のカラーツール。調和のとれたパレットを生成、CSSグラデーションを作成、HEX/RGB/HSL値で色を選び、ピグメントを混ぜ、WCAGコントラスト比を確認、300以上の名前付き色を探索, すべて無料、登録不要。

下のツールを選択して開始

カラーネームデータベース, 300以上の色のHEX、RGB、HSL値

HEXカラーロック

Color Converter

画像からパレット作成

Interactive Harmony Visualizer

Select a harmony type to see how colors relate on the color wheel.

Ideal for CTA buttons and accent elements.

Select harmony type...

HSL(210, 80%, 55%)

Semantic Color Guide for UI States

A clean mapping of colors to their standard UI states.

State	Color	HEX	Usage
Success	Green	`#22C55E`	Form submissions, completed actions, positive confirmations
Error	Red	`#EF4444`	Validation errors, destructive actions, critical alerts
Warning	Amber	`#F59E0B`	Pending states, caution messages, unsaved changes
Info	Blue	`#3B82F6`	Helpful tips, general notifications, informational badges
Disabled	Gray	`#9CA3AF`	Inactive buttons, unavailable options, read-only fields
Link	Indigo	`#6366F1`	Hyperlinks, navigation items, clickable text

Color Theory & Harmonies Explained

Understanding color harmonies helps designers create visually balanced, aesthetically pleasing interfaces.

Color Psychology in Branding & UI

Colors evoke specific emotional responses and cultural associations.

Color	Emotional Association	Industry Use Cases
Blue	Trust, stability, professionalism	Finance, healthcare, SaaS.
Red	Urgency, passion, energy	Food delivery, entertainment, sales.
Green	Growth, health, nature	Health, wellness, fintech.
Purple	Luxury, creativity, wisdom	Premium products, creative tools.
Orange	Enthusiasm, warmth, affordability	CTAs, e-commerce, travel.
Yellow	Optimism, attention, caution	Warnings, highlights, cheerful brands.
Black	Sophistication, luxury, authority	High-end fashion, minimal design.
White	Purity, simplicity, cleanliness	Healthcare, minimal design, tech.

Developer's Cheat Sheet to Color Formats

Choosing the right color format depends on your use case.