partially or completely absorbing some colours of light, while other colours are transmitted. Red, green and blue filters each transmit a single primary colour. Any other colours present in the ...

Certain types of light can affect your mood and quality of sleep. Red light may help, while blue light from phones ... play a role in determining which color light is best for inducing sleep.

It changes the background from white to black. Install blue light-filtering apps ... Use a dim red lightbulb as a nightlight. Red is the color that will least affect your circadian rhythm.