A line of powerful thunderstorms had just wreaked havoc on N. Houston, leaving a fine mist in the air and no wind. I noticed the sunshine beaming through the humidity, turned around, and saw this beautiful rainbow. It was a complete bow starting at the ground on the left and ending at the ground on the right. Aron looked a little closer and saw that there was a complementary bow just above it! Beautiful. Notice that above the main rainbow the sky is darker, while just below it it is a shade brighter...this is quite an interesting optical effect and happens with all double rainbow formations.