Which color formats are supported?

HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK, and CSS named colors. Conversions are lossless between RGB-based formats; HSL and CMYK are calculated conversions.

Why do HEX and HSL values look slightly different on round-trip?

Floating-point rounding in HSL math occasionally yields colors that differ by 1 in a channel. Both representations are visually identical — the hue/saturation/lightness values are just approximations.

Can I convert brand colors (Pantone)?

Not directly — Pantone is a proprietary, physical ink system with no perfect digital equivalent. Use Pantone's own bridge values to get a close HEX match.

What's the difference between RGB and RGBA?

RGBA adds an alpha channel (transparency) from 0 to 1. Use RGBA when you need a semi-transparent color on a webpage; stick with RGB for solid fills.

Why does my hex color look different from the design mockup?

Common causes: (1) Color profile mismatch — designer worked in P3 or sRGB, your monitor renders different gamut. (2) Browser default for color profile (sRGB) vs. native app (varies). (3) Brightness / saturation differences between the design app's preview and live render. (4) Light vs. dark mode contexts. Fix: use sRGB-managed color throughout the design pipeline, calibrate monitor (X-Rite ColorMunki, Datacolor Spyder), check browser color management (Chrome reads embedded ICC profiles, Firefox can be forced to). For brand colors that must match exactly, use Pantone bridge values or Pantone Connect for digital-equivalent codes.

What is the WCAG color contrast standard?

WCAG 2.1 (Web Content Accessibility Guidelines) Level AA: 4.5:1 contrast ratio for normal text, 3:1 for large text (18pt+ regular or 14pt+ bold). Level AAA: 7:1 for normal text, 4.5:1 for large. Test pairs: white (#FFFFFF) on black (#000000) = 21:1 (max). Black on white = same. Light gray (#888888) on white = 3.5:1 (fails AA for normal text). Use WebAIM contrast checker, Chrome DevTools' contrast indicator, or axe DevTools to audit. For most website body copy, 4.5:1 minimum is required; for buttons and interactive elements, treat as text and use the same threshold.

File & Format Converters · Free tool

Color Converter

Convert any color between HEX, RGB, and HSL formats. Paste a code or tweak channels and see updates live — free online tool with no download required.

Updated June 2026

HEX

RGB

rgb(15, 118, 110)

HSL

hsl(175, 77%, 26%)

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What it does

A free color converter that shows HEX, RGB, and HSL at once. Paste a hex code, tweak any channel, or use the native color picker — every other format updates instantly. Everything runs in your browser, so there’s no lag and nothing to install.

HEX is the design-handoff default (#0f766e), RGB is what browsers and CSS think in, HSL is the one that actually maps to how humans perceive color (hue, saturation, lightness). Swapping between them is one of the most common tasks in web design, brand tooling, and data-viz work — this tool makes it a one-click move.

Embed this tool on your siteShow snippet

Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.

<iframe src="https://freetoolarena.com/embed/color-converter" width="100%" height="720" frameborder="0" loading="lazy" title="Color Converter" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>

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How to use it

Paste a hex code or click the color picker swatch.
Edit any R, G, B, H, S, or L value — the rest follow.
Use the Copy button next to any format to copy it to your clipboard.
Supports 3-digit and 6-digit hex; 8-digit hex is truncated to RGB.

When to use this tool

Translating brand colors between design tools (Figma uses HEX, CSS uses HSL, print uses CMYK).
Picking accessible color contrasts and verifying with WCAG ratios.
Converting hex codes from a Sketch / Adobe Illustrator export to RGB for web canvas drawing.
Quick HSL adjustments on existing brand colors (shift hue by 30°, saturation by 10%).

When not to use it

Pantone or other proprietary swatch systems — those need vendor lookup tables.
Color-blind simulation — use a dedicated accessibility tool with simulation modes.
Print-shop CMYK proofing — softproof colors are device-dependent and need ICC profiles.

Common use cases

Designer hands off #0F766E; developer needs RGB(15, 118, 110) for a CSS canvas fill.
Brand auditor checks if button color #1E40AF passes 4.5:1 contrast against white text.
Designer experiments with HSL: 200° hue, 80% saturation, 50% lightness to find new accent.
Email marketer converts brand HEX to a CSS named color for older email clients.

Frequently asked questions

Which color formats are supported?: HEX, RGB, RGBA, HSL, HSLA, HSV, CMYK, and CSS named colors. Conversions are lossless between RGB-based formats; HSL and CMYK are calculated conversions.
Why do HEX and HSL values look slightly different on round-trip?: Floating-point rounding in HSL math occasionally yields colors that differ by 1 in a channel. Both representations are visually identical — the hue/saturation/lightness values are just approximations.
Can I convert brand colors (Pantone)?: Not directly — Pantone is a proprietary, physical ink system with no perfect digital equivalent. Use Pantone's own bridge values to get a close HEX match.
What's the difference between RGB and RGBA?: RGBA adds an alpha channel (transparency) from 0 to 1. Use RGBA when you need a semi-transparent color on a webpage; stick with RGB for solid fills.
Why does my hex color look different from the design mockup?: Common causes: (1) Color profile mismatch — designer worked in P3 or sRGB, your monitor renders different gamut. (2) Browser default for color profile (sRGB) vs. native app (varies). (3) Brightness / saturation differences between the design app's preview and live render. (4) Light vs. dark mode contexts. Fix: use sRGB-managed color throughout the design pipeline, calibrate monitor (X-Rite ColorMunki, Datacolor Spyder), check browser color management (Chrome reads embedded ICC profiles, Firefox can be forced to). For brand colors that must match exactly, use Pantone bridge values or Pantone Connect for digital-equivalent codes.
What is the WCAG color contrast standard?: WCAG 2.1 (Web Content Accessibility Guidelines) Level AA: 4.5:1 contrast ratio for normal text, 3:1 for large text (18pt+ regular or 14pt+ bold). Level AAA: 7:1 for normal text, 4.5:1 for large. Test pairs: white (#FFFFFF) on black (#000000) = 21:1 (max). Black on white = same. Light gray (#888888) on white = 3.5:1 (fails AA for normal text). Use WebAIM contrast checker, Chrome DevTools' contrast indicator, or axe DevTools to audit. For most website body copy, 4.5:1 minimum is required; for buttons and interactive elements, treat as text and use the same threshold.

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