The phrase "nails one colors the mast" can be used to describe the act of making a bold statement or taking a strong stance. To express this sentiment in different words, one could use synonyms such as "takes a firm position," "commits wholeheartedly," or "asserts unequivocally." Other related phrases might include "plants one's flag," "puts one's foot down," or "stands pat." Each of these phrases carries a sense of determination and conviction, indicating a willingness to stand up for one's beliefs and put them on full display for others to see.