unable to change the color of the menu

Hi there,

So the Primary Navigation settings here are not working?
https://docs.generatepress.com/article/colors-overview/

Let me know :)

yes there not working it has the corner from another color

Are you referring to this?
https://www.screencast.com/t/Wewa0j8K

If so try #1 here to eliminate any plugin conflicts first:
https://docs.generatepress.com/article/debugging-tips/

Let me know :)