It's a Deep Sea Blue - so your dark car theory works. LOL
If I could electrify the rails, that would be cool. Believe it or not, I thought about.
Another thing I thought of is putting those spikes on the rails like they do on top of things they won't want pigeons to land, but that didn't seem feasible.
Snakes - I never thought of. haha
I haven't had anything for almost a week now, which is new. fingers crossed!!