Domestic Objects / Tender Buttons

I bought the first button card below at a large indoor flea market that happened every Sunday in Portland. I had no idea why. It moved me and it cost $2.00. I tried various backgrounds and tried adding various objects to my composition, but nothing seemed right. I continued to buy more button cards. One day, the idea came to me to use the visible spectrum— red, orange, yellow, green, blue, violet as the unifying element.