You have found the perfect color for your website. Your design file shows a HEX code, but another tool asks for RGB values. Then your website editor offers HSL sliders.

Which one should you use?

Understanding HEX vs RGB vs HSL makes it easier to move colors between tools and adjust them confidently. These formats can describe the same color—the difference is how you write and edit it.

A Quick Comparison

Here is the same orange in three formats:

The HSL hue shown here is rounded.

What Is a HEX Color Code?

A six-digit HEX code starts with # and contains three pairs of hexadecimal digits:

#RRGGBB

Each pair controls red, green or blue. Values run from 00 to FF, equivalent to 0–255.

For #FF8000:

• FF means red is 255.
• 80 means green is 128.
• 00 means blue is 0.

HEX is a convenient choice when copying a color between a palette, a design file and a website editor.

What Is RGB?

RGB stands for Red, Green and Blue. In the common numeric notation, each channel uses a value from 0 to 255.

For example:

.orange-button {
  background-color: rgb(255 128 0);
}

This produces the same orange as #FF8000.

RGB also supports an alpha value for transparency:

.orange-overlay {
  background-color: rgb(255 128 0 / 50%);
}

A partly transparent color blends with what is behind it, so its visible appearance depends on the background.

What Is HSL?

HSL stands for Hue, Saturation and Lightness.

• Hue selects a position on the color wheel.
• Saturation controls how colorful or gray the color is.
• Lightness moves the color toward black or white.

HSL is helpful when you want variations of a starting color. Try these together:

.orange-light {
  background-color: hsl(30 100% 90%);
}

.orange-base {
  background-color: hsl(30 100% 50%);
}

.orange-dark {
  background-color: hsl(30 100% 30%);
}

These keep the same hue while changing lightness. However, equal HSL lightness values do not guarantee that different hues will look equally bright.

Which Color Format Should You Use?

Choose HEX when you want a short code to copy and share.

Choose RGB when your workflow uses red, green and blue channel values.

Choose HSL when you want to experiment with related shades.

None of these formats automatically makes a design more accessible. Check the contrast between your actual text and background colors. You can test combinations with the HexCopy Contrast Checker.

A Practical Workflow with HexCopy

Imagine you are creating a small portfolio website:

1. Explore the Color Palettes and choose a starting combination.
2. Copy the HEX code for your main accent.
3. Open the Color Converter to get the format your editor needs.
4. Use the Color Picker to explore variations.
5. Check your text and button combinations before applying them throughout the site.

Keep a small reference list of your final choices: page background, main text, accent and borders. This helps you use the same colors consistently across pages.

Common Questions

Does converting HEX to RGB change the color?

An exact conversion preserves the color. Rounding values during conversion can introduce small differences.

Can I mix HEX, RGB and HSL in one stylesheet?

Yes. CSS supports all three. For easier maintenance, choose a consistent convention for your project.

Why does the same color look different on another screen?

Screen settings, display capabilities and viewing conditions can affect appearance. Changing the code format alone does not solve those differences.

Try It Yourself

Start with #FF8000 in the HexCopy Color Converter. Compare its RGB and HSL values, then experiment with a lighter or darker variation.

The goal is to understand your color choices well enough to edit them—and reproduce them—without guessing.

Further reading: MDN: CSS Color Values · MDN: HSL Colors