Color management

[dragoudin]

What feature do you want to see added?

For colors in json files we use some values.
It would be good to support few colors (like white, gray, yellow...) to have a more readable json file.

Moreover, if json file has no attribute color or a keyword like "aleatory", the plugin create automatically colors for each item according a palette

Upstream changes

No response

[simonsymhoven]

implement with #61