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When the famous rainbow gay pride flag was first pieced together by a man named Gilbert Baker in 1978, he used eight colors. Each one represented a certain idea.

There was red for life, orange for healing, yellow for sunlight, green for nature, indigo for harmony and violet for spirit. That first version also had two other colors that would be left out of later flags: pink, which represented sex, and turquoise, art.

Christina Linden said she kept those last two at the front of her mind as she put together, “Queer California: Untold Stories,” an exhibition at the Oakland Museum of California that opened earlier this month.