Crimson is a rich sounding word. It means rich as well, as in a “rich, deep red” inclining to purple (but not exactly purple). I asked myself, how would you use this word? When would you use this word? Crimson is an adjective so describes something. The word sounds so rich it could be used to describe the inner state of someone, as a metaphor. His heart bled crimson. One would have to know what a deep red would signify if using crimson as a metaphor. His heart bled crimson, but what does it mean?