Duplicate(Adding) a custom colors palette

Hi
@manutek75
https://ww.wp.xz.cn/support/topic/adding-a-custom-colors-palette/
this topic is closed so I start new topic

I also looking for a method and find out.
As of May 5, 2026, copy 01-evening.json from themes\your-block-theme\styles\colors (themes\twentytwentyfive\styles\colors).
Rename the file to 09-moonlight.json.
Change the content of 09-moonlight.json from Evening/evening to Moonlight/moonlight.
You need to upload it to the server.
I couldn’t find a way to directly duplicate from the default theme color palette.
I think this method is also effective for other block themes.

This topic is discussed on WordPress Gutenberg GitHub.
https://github.com/WordPress/gutenberg/issues/69212