How can I create a two-color main menu on different pages?

Store Design
1

Hi all, I just wonder, How can I make the Menu in 1 color for main page.
And in an another color at other pages.
See this website:
https://kittybowlplus.com/
You can see the main page menu colored in white.
If you got to any other page, it is colored in black.

2

@davethedave2
Hi,
first of all Its https://kittybowlplus.com/ Your website. if not please share your website url