Changing black theme to lighter

As i have suggested in the chat to replace our organization’s logo image to this 9c179cb43e05be4489286716d0a/ofmeet/src/i… on GitHub (looks nicer than a black square) i was also thinking about the header on our site. That black striking color is not looking intune with say Openfire admin console color palette. We don’t have such striking blacks anywhere in our software. Would actually prefer for the header to be lighter (grayish or white).