As somebody with synaesthesia this doesn't really sound related, my synaesthesia is basically that there is something intrinsically mustard yellow about the number 4 and something red about the letter k (and words that start with k). That doesn't mean I see 4s as yellow or words that begin with k are red in a book it just means when I think about them they have that color. This on the other hand seems much more direct, almost more like the holywood version of synaesthesia.