It's exactly what I made, an I didn't see any changes... now I see them unter "more colors"/tab templates
I'd suggest you to make a button to customize this, because I'd like that all my front-end editors only would use the permitted standard colors...
This way I wouldn't risk that they use ugly colors, and wouldn't need to eliminate totally the color palette
Thanks for this tutorial, and also for this https://www.joomlacontenteditor.net/support/tutorials/editor/creating-custom-styles
But I think if is possible to change the default principle palette with many own colours and not use the path of the template or custom styles.
Infact could be necessary to have not 4 or 5 personal style but twenty and the path "more colours"->"template"->"custom colours" is not immediatly.
So I say It is possible to modify this?