Not sure what you mean about neopolitan ice cream? At lower Clearance, a citizen might expect a few very limited flavors (most artificially simulated). As Clearance improves, options expand, flavors improve, natural additives pop up and neopolitan ice cream becomes a luxurious pleasure, rather than a confusion of tastes.
The color of neopolitan ice cream doesn't represent an issue, unless you're running a Zap game and you feel inclined to make it an issue. Pink, brown and a sort of cream color don't really represent a security clearance issue.