Almost certainly you do....the grapheme-colour synesthesia (the colour/word/number association) is quite common. I too grew up with the party trick of being able to reverse words, so that too may be related to some aspect of synesthesia.
Synesthesia in general, is possibly more common that one might imagine, I recall discussing several years ago, mentioning over dinner (with strangers) the indigo-hue I see pervading my vision when feeling sad, and one fellow diner piped-up with; "doesn`t everybody feel in colours, then?"
It`s a fascinating subject and synesthesia raises some profound sensory questions about how and what we really perceive about our world.