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Colour scale generator
Smooth steps between two colours for charts, maps and gradients.
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- No sign-up
- Works on any device
About Colour scale generator
Choose a start and an end colour and the number of steps, and get evenly spaced colours between them. It is handy for chart series, heat maps and gradients. Interpolating in a perceptual space avoids the muddy grey middle that straight RGB blending often produces between opposite hues.
How to use Colour scale generator
- Enter a start colour and an end colour.
- Set the number of steps you want between them.
- Copy the list of colour codes for your chart, map or gradient.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
How many steps should a chart colour scale have?
Five to nine steps are easy to tell apart. More than that and neighbouring shades look identical, so group the data or add labels instead.
Should the start and end colours be very different?
Choose ends with a clear difference in lightness so each step is distinguishable. Two colours of similar lightness give a scale that is hard to read.
Can I use the scale for a map legend?
Yes. Use as many steps as you have categories or value ranges, and check that the lightest step still stands out from your map background.
Is Colour scale generator free?
Yes. Colour scale generator on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Colour scale generator on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.