By modulating the amount of blue in our environment, we can help people to relax, or to be alert; to fall asleep, or to stay awake. (Rogier van der Heide)

By modulating the amount of blue in our environment, we can help people to relax, or to be alert; to fall asleep, or to stay awake.

Rogier van der Heide

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alert amount blue environment fall help people relax stay

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