Menu Font Color changes from white to red if i am inside a post

Hello There, I have a strange Problem. On my Landing Page / Homepage all Menu-Items are white (as it meant to be, i like that): If i go to another page or posts, the fonts are turning to red (i know this has to be to do with the "Link" Color in the Color Options). Only teh Active Sub-Section is white: Now my question: How can i change the color in the menu in sub-pages and postst to the following: - All text White - Active Sub-Page red - No touching of the other links in the texts (they shall remain red) Thanks for your Help. BR Dirk