A nice and useful find: Palette Creator!
I had the chance to discover this little tool during a presentation at ISTE. It is very simple to use:
Step 1 : Download the tool on the Chrome web store and install: https://chrome.google.com/webstore/detail/palette-creator/oolpphfmdmjbojolagcbgdemojhcnlod
Step 2: choose an image or picture
Finally, click right to see the Palette Creator option appear. You can select how many colours you want. And there you go!
Thanks to the colour codes, you can select colours that will work with your chosen image. Websites like Canva allow you to choose the colour of the fonts you are using or the colours of images or background with the colour numbers. A nice easy way to become a graphic artist!