Color code converter online: HEX, RGB, HSL, HSV

You can convert any color between HEX, RGB, HSL, and HSV formats instantly using ToolHQ's color code converter, no design software needed.

ToolHQ's Color Code Converter is a free browser-based tool that converts colors between HEX, RGB, HSL, and HSV formats instantly, with a live color preview so you always know you're working with the right shade.

Designers and developers constantly run into the same problem: a color is specified in one format, and their tool, stylesheet, or design system needs another. Your brand color is #2563EB but your CSS variable needs it as rgb(37, 99, 235). Your design token is in HSL but your Figma component shows HSV. Switching between these formats by hand means doing math you shouldn't have to do. The converter handles it in a single click.

Key Takeaways

• HEX, RGB, HSL, and HSV all represent the same colors, they're just different notations
• Converting between formats by hand requires non-trivial math; a converter does it instantly
• HSL is the most human-readable format: hue (0–360°), saturation (%), lightness (%)
• CSS supports HEX, RGB, and HSL natively, making conversions a daily developer task
• ToolHQ's converter shows a live color preview so you can visually confirm the result

---

What are color code formats?

Every color on a screen is defined by three values. The formats differ in how they express those values.

HEX is a base-16 notation most commonly used in web development. #FF5733 is shorthand for red=255, green=87, blue=51. Each pair of hex characters represents one color channel (0–255). HEX is compact and universally understood in CSS and HTML.

RGB expresses the same three channels as decimal values: rgb(255, 87, 51). It's more readable than HEX and is the format used natively in CSS for color functions, gradients, and transparency via rgba().

HSL (Hue, Saturation, Lightness) is the most human-friendly format for adjusting colors. Hue is a degree on the color wheel (0–360), saturation is the intensity (0–100%), and lightness controls how light or dark the color is (0–100%). The W3C CSS Color Module Level 4 includes HSL as a first-class CSS color format.

HSV (Hue, Saturation, Value) is similar to HSL but uses "value" (brightness) instead of lightness. HSV is common in design tools like Photoshop, Figma color pickers, and color selection UI components. The main difference: in HSV, a fully saturated red with value=100% is a bright red; in HSL, the same parameters produce a lighter result.

According to MDN's documentation on CSS color values, CSS currently supports HEX, RGB, RGBA, HSL, and HSLA natively, with newer formats like HWB and LCH available in modern browsers. Understanding the core four (HEX, RGB, HSL, HSV) covers the vast majority of real-world conversion needs.

---

When should you use a color code converter?

Almost any time you work across tools that use different color notation. The need is frequent enough that bookmarking a fast converter is genuinely useful.

Specific scenarios:

• A designer hands you a color in HEX, but your CSS framework expects HSL for theming variables
• A Figma color picker shows HSV, but your design system is documented in RGB
• You're building a dark mode and need to adjust lightness in HSL, but your component library uses HEX
• You're working with a brand color guide that lists HEX codes and need to create CSS custom properties in both HEX and RGB for browser compatibility
• You're debugging a color mismatch between two systems and need to verify they're expressing the same color in different formats

A quick story: Nadia was building a UI component library for a fintech startup. The brand guidelines specified all colors in HEX. Her CSS architecture used HSL custom properties so developers could easily create tints and shades by adjusting the lightness value. She had 14 brand colors to convert. She opened the color code converter, pasted each HEX value, grabbed the HSL output, and had all 14 converted in about four minutes, without writing a single line of conversion code or touching a calculator.

Convert your color codes now with ToolHQ, free, instant, no sign-up

---

How to convert a color code step by step

1. Open the color code converter. No account or installation needed. The tool loads instantly in your browser.
2. Enter your starting color. Type or paste your color value into the input field for the format you have, HEX, RGB, HSL, or HSV. For HEX, include or omit the # prefix; both work.
3. See all four formats instantly. As soon as you enter a valid value, the tool displays the equivalent color in all other formats simultaneously. No button to click.
4. Check the live preview. A color swatch shows you the actual rendered color so you can visually confirm you've entered the right value, especially useful if you're troubleshooting a mismatch.
5. Copy the output you need. Click to copy any of the output values in whichever format your target requires.

If you're converting many colors, you can just clear the input and enter the next value, the results update in real time.

---

Tips and common mistakes

Watch out for HSL vs. HSV confusion. These look similar but behave differently. A fully saturated color with maximum value in HSV (hsv(0, 100%, 100%)) is pure red. The HSL equivalent of pure red is hsl(0, 100%, 50%), note 50% lightness, not 100%. If your colors look slightly off after conversion, double-check which format your design tool is actually using.

8-digit HEX includes opacity. Standard HEX is 6 digits (#RRGGBB). An 8-digit HEX (#RRGGBBAA) includes an alpha channel. If you see an 8-character HEX in CSS, the last two digits are opacity (00 = fully transparent, FF = fully opaque). The converter handles 6-digit HEX; for alpha channels, convert to RGBA manually.

CSS HSL uses commas or space-separated syntax depending on browser version. Old CSS syntax is hsl(120, 100%, 50%). Modern CSS Color Level 4 syntax is hsl(120 100% 50%). Both are valid in current browsers, but make sure your codebase is consistent.

Verify converted colors against your design tool. If you convert a HEX to HSL and paste it into Figma, Figma will show you the HSV equivalent, not HSL. If the numbers look wrong, that's why. You need to look at Figma's RGB or HEX output to verify.

For CSS variables, HSL is the most flexible format. Once your base color is defined in HSL, creating tints and shades is as simple as adjusting the lightness value: hsl(220, 70%, 30%) for a dark shade, hsl(220, 70%, 80%) for a light tint. This is much harder to do in HEX.

Related developer tools: CSS minifier for cleaning up your stylesheets, JSON formatter for working with design tokens, and the full developer tools category for everything else in your front-end workflow.

A quick story: Dev was debugging a color mismatch between his React component and the Figma mockup. The Figma file used #1A73E8 for a primary button. His CSS showed rgb(26, 115, 233). He wasn't sure if they were the same color or if a mistake had been introduced. He opened the converter, entered the HEX value, and saw the RGB equivalent was rgb(26, 115, 232), off by one in the blue channel. He compared the Figma source again and found a typo in the handoff doc. Five-second fix.

---

Frequently asked questions

Are HEX and RGB the same color space?

Yes. HEX is just a different notation for the same RGB values. #FF5733 and rgb(255, 87, 51) are identical, HEX uses base-16 encoding while RGB uses base-10 (decimal).

Which format should I use in CSS?

Any of the three CSS-native formats (HEX, RGB, HSL) work in modern browsers. HEX is most common in codebases. HSL is best when you need to programmatically adjust tones, tints, and shades. RGB is preferred when you need transparency via rgba().

Why doesn't CSS support HSV directly?

HSV was developed primarily as a UI concept for color pickers in design software. CSS adopted HSL instead because lightness maps more intuitively to perceptual brightness in the context of web design. Most browsers don't support HSV in CSS natively.

What does the "value" in HSV mean?

Value (also called brightness) represents the maximum intensity of the color. V=0% is always black. V=100% at full saturation gives you the pure hue. It differs from HSL's lightness, where L=100% is always white regardless of hue.

Can I convert RGBA or HSLA values?

The converter handles the base color channels (HEX, RGB, HSL, HSV). Alpha transparency (rgba, hsla) involves a fourth channel not covered in standard color space conversion, you can convert the color portion and add the alpha value manually.

What about CMYK? Why isn't it included?

CMYK (Cyan, Magenta, Yellow, Key/Black) is the color model used in print design, not on screens. Screens use additive color mixing (RGB-based formats), while printers use subtractive mixing (CMYK). Converting between RGB and CMYK is an approximation, not an exact mathematical relationship, because the two color spaces have different gamuts (ranges of possible colors). Many colors that look vivid on a screen cannot be reproduced in print with CMYK inks, and vice versa. For print design work, use Photoshop, InDesign, or a dedicated print color tool to handle CMYK conversion with proper color profiles.

What are OKLCH and OKLab, and should I use them in CSS?

OKLCH and OKLab are newer perceptually uniform color models that CSS Color Level 4 supports in modern browsers. Standard HSL and RGB are not perceptually uniform: two colors with the same lightness value in HSL can look very different in actual brightness to the human eye. OKLCH (L = lightness, C = chroma, H = hue) and OKLab are designed so that equal numeric steps produce equal-looking perceptual changes. This makes OKLCH particularly useful for building design systems where you want consistent-looking shades and tints across different hue values. For most practical web development work today, HEX, RGB, and HSL remain the standard and have full cross-browser support going back many years. OKLCH is worth learning if you work on design systems or color palettes where perceptual consistency across hues matters. Browser support for OKLCH is good in current versions of Chrome, Firefox, and Safari, but you may need fallbacks for older browsers.

How accurate is the conversion?

Color space conversion between HEX, RGB, HSL, and HSV is mathematically exact. There's no approximation involved, the tool applies the standard transformation formulas and the results are precise to the values your CSS will render.

---

Conclusion

Color format conversion is one of those tasks that feels small but happens constantly in design and development workflows. Having a fast, accurate converter bookmarked means you never waste time doing hex-to-decimal math manually or hunting for the right formula.

ToolHQ's color code converter shows you all four formats at once, gives you a live preview, and lets you copy exactly what you need. Open it, paste your color, done.

For related front-end tools, the CSS minifier helps clean up your stylesheets, and the developer tools category has JSON formatting, base64 encoding, and more.

Convert your color codes now, free, instant, all four formats at once

---