Developer Tools
Color Picker Online Free
Choose a colour visually and copy equivalent HEX, RGB and HSL values for CSS, UI design, themes and design-system documentation.
Color conversion & contrast workspace
Pick or enter a color, convert it to common CSS formats and check readable text contrast against white and black.
HEX
#2563eb
RGB
rgb(37, 99, 235)
HSL
hsl(221, 83%, 53%)
CSS variable
--brand-color: #2563eb;
Complement
#da9c14
5.17:1
4.06:1
About Color Picker
Color Picker lets developers and designers choose a colour visually and copy equivalent HEX, RGB and HSL values. HEX is convenient for compact CSS declarations, RGB maps directly to red, green and blue channels, and HSL can be easier when adjusting hue, saturation or lightness for a design system. The tool helps translate one selected colour into formats used by CSS, design tokens and UI documentation.
Key Features
How to Use
- Open the colour control and choose the desired shade.
- Review the generated HEX, RGB and HSL values.
- Copy the format required by your stylesheet or design system.
- Check contrast against foreground and background colours before publishing.
Practical Example
Input
Selected colour: #2563eb
Output
HEX: #2563eb RGB: rgb(37, 99, 235) HSL: hsl(221, 83%, 53%)
Popular Use Cases
Best Practices
- ✓ Check text contrast against WCAG accessibility guidance.
- ✓ Store recurring colours as CSS custom properties or design tokens.
- ✓ Avoid relying on colour alone to communicate an error or status.
- ✓ Test colours on real screens and in both light and dark themes.
Common Mistakes
- • Choosing a visually attractive colour without checking contrast.
- • Using slightly different hard-coded colours across components.
- • Confusing RGB channel values with percentages.
- • Assuming the same colour will look identical on every display.
Privacy and Processing
The selected colour is converted between formats inside your browser. No image, design file or colour value needs to be uploaded for this tool.
Important limitation: The picker converts colour formats but does not calculate full colour palettes, simulate every form of colour-vision deficiency or certify accessibility compliance.
Frequently Asked Questions
What is a HEX colour?
HEX represents red, green and blue channels using hexadecimal values, such as #2563eb.
What is the difference between RGB and HSL?
RGB uses channel intensity values, while HSL describes hue, saturation and lightness, which can be easier for controlled adjustments.
Can these values be used in CSS?
Yes. Modern CSS supports HEX, rgb() and hsl() colour syntax.
Does the picker support transparency?
This basic picker focuses on opaque colours. Use rgba() or hsla()/modern alpha syntax when transparency is required.
How do I know whether text is readable on the colour?
Use a dedicated contrast checker and test normal, hover, disabled and focus states.
Are selected colours stored?
No. Conversion happens locally in the browser.