Change CSS styling of .fieldupdate-highlight class on Canvas view

Change CSS styling of .fieldupdate-highlight class on Canvas view

We have been setting up Canvas views for users. One of the biggest issues we have is unreadable text when a field is updated. CRM refreshes the area where the update occurred and adds light colored background that makes the white text unreadable. The .fieldupdate-highlight class is added to the elements but I can find no way to set in Canvas.

Am I missing a setting or is this a common problem? How do I fix this?

I've attached a screen capture to show the effect.