How can the color of the smart buttons/mandatory field in the community edition be edited?

As it seems this is not part of the primary_variables.scss.  This also seems to be the case on the 'mandatory' fields like name and email in the contacts.  The background color is in a light purple, but I can't seem to get it changed.

I have been looking in the primary variables for the specific color, but can't to find anything.

Can someone please point me in the right direction?