Color Converter - HEX, RGB, HSL

Convert between HEX, RGB, HSL, and CMYK with live preview

🔒 100% ブラウザ内🆓 ずっと無料⚡ サインアップ不要
注意: 下記のツールインターフェースは現時点で英語のみに対応しています。UI の翻訳は順次進めています。 このツールを英語で見る →
HEX
RGB
HSL
hsl(221, 83%, 53%)
CMYK
cmyk(84%, 58%, 0%, 8%)

使い方

  1. 1
    Enter a color

    Type a HEX code, RGB values, HSL values, or use the color picker.

  2. 2
    See all formats

    The other three formats update live alongside a color preview.

  3. 3
    Copy any format

    One-click copy for HEX, RGB, HSL, or CMYK.

Color Converter - HEX, RGB, HSL について

Free online color converter. Convert any color between HEX, RGB, HSL, and CMYK formats with a live preview swatch. Copy any format with one click. Perfect for designers moving between Figma, CSS, and print workflows. 712 Tools の Color Converter - HEX, RGB, HSL はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。

デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。

よくある質問

Does it support alpha (RGBA / HSLA)?

Yes. If you enter #RRGGBBAA or an rgba() value, alpha is preserved across all formats that support it.

How accurate is the CMYK conversion?

It uses the standard math-based sRGB → CMYK formula. For print-accurate CMYK (with an ICC profile) use a design tool - screen CMYK is always an approximation.

Which HEX formats are accepted?

3-digit (#f0a), 4-digit with alpha (#f0a8), 6-digit (#ff00aa), and 8-digit (#ff00aa88).

Is my color data sent anywhere?

No. Conversion runs entirely in your browser.

続きを読む

5 分で読了

The WCAG color contrast checklist every designer should bookmark

AA vs AAA, the math behind the ratios, why gray-on-gray fails on retina screens, and the two-line HTML that makes a color contrast test run in seconds.

5 分で読了

Glassmorphism, neumorphism, and where 2026 UI is actually heading

The design trends that shipped, the ones that flopped, and what makes modern UI actually feel modern - from frosted glass to soft shadows to conic gradients.

4 分で読了

CSS gradient patterns that actually look good (and the two that don't)

Two colors and a 45° angle is not a gradient - it's a shortcut to a design that looks like every SaaS site from 2018. Here's how to build ones that don't.

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