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A little under two weeks ago, Amazon added a ‘Blue Shade‘ filter to its Fire tablets to help you fall asleep after nighttime reading. Not to be left behind, Google just essentially did the same for Play Books, calling it Night Light. If you’re not caught up with your science, blue wavelengths of light tend to keep people awake, even after they’re done reading. Daylight contains a lot of blue, and smartphone displays are generally calibrated to match sunlight’s color temperature. By filtering out those colors (and essentially ending up with a pale orange/amber tint) you’re able to fall asleep more easily after…

This story continues at The Next Web
Source: The Next Web

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