change the background color of outsystems menu


I have created some pages links in the Outsystems menu. But they are very hard for  users to read.
Can I change the background color? I have used css to change it, but it didn`t work. 
Please give some suggestion, thanks a lot.

Hi eric,

Of course the colours *are* determined by some CSS. Just use the brower's devtools to find out what CSS to change.