Changing menu colour?

Hello
I want to change the colour of my menu items to white, as I changed the background and now they don’t show up as they are black. However, despite searching on inspect element and so on, I cannot find what CSS to add into additional CSS. Also, I have tried adding code into the menu title in the menu management page, which was another trick I found, but even though I’m putting in the hex for white, it is coming up as light green. I also posted this in Melos Business theme forum but have got no replies so reposting. Please could somebody help? Many thanks.

• This topic was modified 4 years, 4 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Developing with WordPress topic

The page I need help with: [log in to see the link]