A company can sue you for anything. Don't be intimidated in your color choices. The only way they win is if you don't fight!
The only way? How about if they overpower you in an expensive, drawn-out court battle.
Not only is the law stupid, but in the US the process to resist it is seriously flawed.
Books from Nolo are very valuable when you are defending yourself.
Take it as an opportunity to build a legal defense information system, then sell it and make a bundle off the experience you gain.
If there is a claim for damages or restitution or whatever, and you may be out of pocket if you lose, you need to weigh the cost of legal help versus the risk of losing.
I guess I'm skeptical that simply being right is enough to triumph in court against a determine company with a lot of money and little conscience.