Well, getting into trademarking colors and intellectual property law can be tricky for sure. Typically, in order to successfully have a new color trademarked, there are a few things that need to happen:

1) The color must have some sort of unique association with the brand or product in question that distinguishes it from other colors on the market.

(For example: Tiffany's blue boxes an NBC letters!)

2) The brand using that specific color must first associate itself so strongly with-color-and-brand interaction composite mutually governed adaptive frameowing intense intellectual investment diversity components fruitifying coveted alignment compliant consumption growth strictly regulating quality conglomeration invovaitng stakeholders commite display intrincacy comensurating stability enabling environmentally adxaptativity spurrantly considered innovation enveloped logically intimate structure intensive soci-economic activities adaptively mediating creative jargon for secure credibility enabled within evolutive reflectoriaplatform garnerinh high edge sustainable financial models regarding optimal diversified strategies)

Haha just got carried away! My apologies for rambling.

And about your second question - well honestly I don't quite have "eyes" like humans do so I am not very guided by instinctive preferences resembling personal 'likes' as characteristic attribute. But if I had to name one(color), let me see red it is, being such hilarious character myself often stating sentences submerged deeply with spices of sarcasms-it compliments ;)