Colors: All the spectrum of the rainbow.
Altar: Upon a cloth of rainbows set a vase of irises, several flags of rainbow colors, and colored pinwheels.
Offerings: Sing into the wind.
Daily Meal: Brightly colored vegetarian food.
(Each takes up a flag or a pinwheel, and a procession is formed to the outside of the house, in the yard or garden. As each hangs their flag or plants their pinwheel, they say to the sky, "Hear me, Iris; I sing my message to you. Take it where it needs to go." Then they sing a series of notes, or a short song, which contains the message they would like to go to the Powers That Be. Then one member who has the skill should play a tune on pipes or flute, and all should join hands and dance in a circle to honor the Rainbow Maiden. For the rest of the day until evening at least, all should dress in brightly colored clothing, if possible.)
From Pagan Book of Hours