Iranian artists have been blocked from shipping work for exhibition in the United States because the paintings contain the color green, according to the LA Times. “From the Streets of Iran” will still open tonight at Los Angeles’ Crewest Gallery, only without some of the emerald-colored urban art that Iranian postal inspectors decided was unsuitable to send. Worn by Mousavi supporters prior to the election, the color green has become a Twitter meme as well as a protest symbol against purported voting fraud. However, the color censorship has only strengthened the organizer’s resolve to go on with the show, still featuring some blatantly revolutionary themes that the censors failed to catch.

Images via Crewest