I usually worry about total accuracies, what to watch out for, or these so-call experts; aka: rivet counters say. I look at it this way… I build for my enjoyment. I'm not entering any IPMS contests - which is widely political and fickle depending on the judges.

As Panther mentioned, we all made mistakes and learn from them. That's the beauty of this hobby. Build for your enjoyment.

I tend to be a stickler on myself to figure out which color looks close enough for me. I often look at the instruction guide color assignments. Most of the time they'll list the paint brand number of their color line. I'll refer to paint4models to cross reference on their Federal Standard number. I may have multiple colors of FS in different paint brand. I often find myself making paint samples and determine my choice which to use.

Sometimes, I'll research the correct color of the subject online. You'd be surprised what kind of information (or misinformation) you'll find.