Interesting thread indeed! It's great to know that there are some more people who have such experiences! And I was thinking I was living up to my nickname and going crazy...so there! :)

To me, several the guitar chords have different colors: A minor is a dark, mossy green, E minor is a dark brown (like good, fertile earth), D major is bright yellow like sunflowers, C major is a silvery, greyish blue, F major is pale yellow, E major is a lighter shade of brown than E minor...the majors are usually the same color as the minors, only a shade or two lighter.
And yes, musk and patchouli smell black and sandalwood sandy-colored...I have incense sticks that smell orange, too. Not of oranges, just orange. To me, some songs also evoke certain pictures, but I never succeed in drawing them. Such a pity!

Weird, isn't it? For me, it was only natural because it has been like that all my life. Has anyone of you ever tried to tell other people about this?