Practical guide
How to Use a Color Picker: HEX, RGB, and HSL Explained
A colour picker gives you a reusable value for a colour, not just a visual swatch. The SmartEdgeTools Color Picker shows the selected colour in HEX, RGB, and HSL, and offers nine lighter and darker-looking shades to copy. This guide explains what each format means, how to use the shades, and how to check that text on that colour stays readable.
By Ather Saud · Updated on November 1, 2026
Pick a colour two ways
Use the browser colour control to pick visually, or enter a six-digit HEX code directly. The tool starts with #E85D2F, a warm orange-red. When you change the colour, all formats update together, so copy the format your tool needs rather than retyping a value from another format and risking a typo.
HEX is the most common value in CSS and design tools. RGB gives the red, green, and blue channels as numbers. HSL gives hue as an angle, saturation as a percentage, and lightness as a percentage, which is often easier for adjusting how vivid or light a colour feels.
Worked example: #E85D2F
For the starting colour #E85D2F, the red channel is 232, green is 93, and blue is 47, so the RGB value is rgb(232, 93, 47). In HSL, the hue is about 15 degrees, saturation about 80%, and lightness about 55%, written hsl(15, 80%, 55%). The exact rounded values shown by the tool are the ones to copy for your design.
HEX uses pairs of hexadecimal digits for red, green, and blue. E8 is 232 in decimal, 5D is 93, and 2F is 47. That is why the same colour can be written in three different notations without changing how it looks.
Use the shades, but check them
The shade row shows nine variations from darker to lighter, made by scaling the colour, and clicking a shade copies it. Shades are useful for hover states, backgrounds, borders, and accents that should feel related without being identical. Do not assume a shade is automatically readable for text: a light shade may be fine for a background but poor for small white text, and a dark shade may be fine for text but too heavy for a large background.
Name colours in your design system when you reuse them, such as brand orange, brand orange dark, and brand orange light, and record the HEX value with each name. That prevents small variations from spreading across pages.
Contrast is a separate check
A colour value alone does not guarantee readable text. Check the contrast between the text colour and the background colour at the size and weight where it will appear, and do not use colour as the only way to communicate meaning, such as red for error with no icon or text. A colour that looks clear on your screen may be harder to read on a phone in bright light or for a person with low vision.
For important text, test the combination with a contrast checker and test it on a real device. For decorative elements, such as a border or a large illustration, exact contrast matters less, but keep the design consistent and avoid combinations that vibrate or strain the eye.
| Format | Example for #E85D2F | Common use |
|---|---|---|
| HEX | #E85D2F | CSS and most design tools |
| RGB | rgb(232, 93, 47) | When channel values are needed |
| HSL | hsl(15, 80%, 55%) | Adjusting vividness and lightness |
Key takeaways
- HEX, RGB, and HSL describe the same colour in different notations.
- Copy the format your tool needs, and copy shades directly to avoid typos.
- Check text contrast separately; a colour value alone does not guarantee readability.
Frequently asked questions
What is the difference between HEX and RGB?
HEX writes the red, green, and blue channels as hexadecimal pairs. RGB writes the same three channels as decimal numbers. Both describe the same colour.
Can the picker sample a colour from a photo?
No. It shows values for the colour you pick or enter, and shades of that colour. It does not sample colours from an image or from another part of your screen.
How do I copy a shade?
Click the shade in the shade row. The tool copies that shade value for you to paste into your design.
Why does my colour look different on another screen?
Screens differ in brightness, calibration, and colour settings, so the same value can look slightly different. Check important colours on the devices your audience will use.