OK, I understand how Catholic and Christian churches have adopted various colors to be displayed and/or worn throughout the year. Violet, white, green, red, gold, black, rose and other colors are employed and ascribed significance. White could mean light, innocence, purity, joy, triumph, or glory. Red represents the Passion, blood, fire, God's Love, or martyrdom.
So I'm standing there in the office and one of the chaplains asks me, "Do Unitarian Universalists have liturgical colors?" The answer came to my lips quickly - "Rainbow. We have the rainbow."
A full spectrum of color is a good way to portray our full spectrum of belief, reason, and tradition. And a rainbow may be worn or displayed any day; no special occasion required.
I may have to get a rainbow shirt to wear to the hospital.