Web Color Codes Explained: HEX, RGB and HSL for Every Use Case
Learn how web color codes work, including HEX, RGB and HSL. See examples, when to use each format and how to copy exact website colors.
9 October 2026
Quick answer:
- HEX is compact and useful for CSS, Figma, Canva, design systems and brand guides.
- RGB describes red, green and blue channels and works well for digital UI and transparency.
- HSL uses hue, saturation and lightness, making related shades easier to adjust.
- The same visible web color can often be written in all three formats.
- For most website work, choose the format that fits your workflow instead of trying to find one “best” format.
- Use AutoColorPicker to pick a webpage color and copy its HEX, RGB or HSL value.
Web color codes tell browsers, design tools and developers exactly which color to display.
You will see many CSS color formats today, but HEX, RGB and HSL remain three of the most useful formats for everyday website design and development.
Table of contents
What Are Web Color Codes?
A web color code is a value that represents a color in CSS.
For example, this blue can be written in three different ways:
| Format | Example | Meaning |
|---|---|---|
| HEX | #2563EB |
Red, green and blue written in hexadecimal |
| RGB | rgb(37 99 235) |
Red, green and blue channel values |
| HSL | hsl(221 83% 53%) |
Hue, saturation and lightness |
If you need to copy colors from an existing site, the website color code workflow shows how to move exact values into Canva, Figma and CSS without matching colors by eye.
HEX Color Codes: Best for Fast Copying and Design Handoff
HEX codes begin with #, followed by values representing red, green and blue.
Example
color: #111827;
Standard six-character HEX uses two characters for each channel:
RR = red
GG = green
BB = blue
HEX is useful when you need a compact color value that can move quickly between CSS, design files and brand documents.
It is less intuitive when you want to make a color slightly lighter or less saturated. In that case, HSL may be easier.
RGB Color Codes: Best for Digital Color Control
RGB stands for red, green and blue. Each channel contributes to the final color.
Example
background: rgb(37 99 235);
RGB is especially useful when working with digital interfaces and transparency.
Modern CSS can add alpha transparency directly:
background: rgb(37 99 235 / 50%);
When sampling colors from photos or screenshots, use the image color code guide to capture the exact visible pixel as HEX, RGB or HSL.
HSL Color Codes: Best for Adjusting Related Colors
HSL separates color into three values:
- Hue: position around the color wheel.
- Saturation: how intense or muted the color looks.
- Lightness: how dark or light the color appears.
Example
background: hsl(221 83% 53%);
HSL is handy when building variations from one base color.
For example, you can keep the same hue and reduce lightness for a darker button state. If you need to move between formats, see the HSL to HEX conversion guide.
HEX vs RGB vs HSL: Which Should You Use?
| Format | Best For | Main Advantage |
|---|---|---|
| HEX | Design systems, CSS, Figma, Canva | Compact and easy to copy |
| RGB | Digital interfaces and transparency | Direct channel control |
| HSL | Color variations and UI states | Easier visual adjustments |
Simple rule: use HEX for quick handoff, RGB when channels or transparency matter, and HSL when you want to adjust a color family more naturally.
Are HTML Color Codes Different From CSS Color Codes?
Not in modern web styling.
When people search for “HTML color codes,” they usually mean color values used through CSS.
<p style="color: #2563EB;">Blue text</p>The HTML element contains the content. CSS defines how that content looks.
How to Copy Web Color Codes With AutoColorPicker
1. Open the website
Go to the page containing the color you want.
2. Activate AutoColorPicker
Start the extension from Chrome.
3. Hover over the exact color
Pick from the center of a solid area instead of a shadow or edge.
4. Copy the format you need
Use HEX, RGB or HSL depending on your next task.
5. Save the color by role
Label it as Primary, CTA, Background, Text or Accent instead of saving random codes.
For a full website audit, use the website color picker guide to separate brand colors, buttons, backgrounds, text and UI states.
Common Web Color Code Mistakes
Picking a shadow instead of the real color
Sample the middle of a flat area when possible.
Treating a gradient as one color
Save the main gradient stops separately.
Ignoring transparency
A semi-transparent overlay can look different from its base color.
Forgetting contrast
A correct color code can still be a poor choice if text becomes difficult to read.
If your design uses gradients, the linear gradient guide explains how to combine exact color values into practical CSS backgrounds.
FAQs About Web Color Codes
What are web color codes?
Web color codes are values used in CSS to define colors for text, backgrounds, borders, buttons and other interface elements.
Is HEX better than RGB?
Neither is universally better. HEX is compact and convenient for handoff, while RGB can be clearer when working with individual color channels or transparency.
When should I use HSL?
Use HSL when you want to change hue, saturation or lightness directly, such as creating darker, lighter or muted variations of one base color.
Can HEX colors include transparency?
Yes. CSS supports eight-digit HEX values where the final two digits represent alpha transparency, although RGB with an alpha value may be easier to read in some workflows.
How do I find the exact color code from a website?
Use a browser color picker, hover over the exact webpage color, select it and copy the HEX, RGB or HSL value. Avoid shadows, edges and transparent areas when you need the original solid color.
Pick the exact web color instead of guessing
Use AutoColorPicker to identify website colors and copy HEX, RGB or HSL values directly into your design or CSS workflow.
Download AutoColorPicker Free