Doesn't bother the color blind people.

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gray,grey,orange,recycling-is-good-right,sign,signs,woods
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Local greenway trail changed the blazes on the trail from orange to blue, but opted for the inexpensive fix when it came to the wood engraved sign.

O Exit.

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exit,Portal,sign,video game
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Not that I really needed the "N." Someone just had OCD I guess.