TBH I'm not sure what is dominant. But Yes, red is dominant - often shows on the fins. Red is difficult to get rid of once it's in the.... line. Irid is also dominant and more often show on the body.... also said to be difficult to restrain.
Marble may also be dominant or at least hard to erase once it's in your line - I always get them after breeding non marbles for many generations. Butterfly is similar to marbles (I think - at least in my case)
Other than that I'm not sure because I get mixed/inconclusive results. All I can say is that it depends on which color gene is stronger in the genetic back ground.