The fruits are arranged in rainbow-flag order. If I'm not mistaken, these were made by Dustin Lambro of Washington United for Marriage and Josh Castle of Equal Rights Washington, and served at the 43rd District Democrats' Pride Day Brunch this morning.
Yes, I was puzzled by the picture as well. Mr. Takei's FB page had a much better picture that clearly explained the visual. Dear The Starnger, you could learn from Mr. Takei.