GOLDEN HOUR - PERIOD OF DAYTIME SHORTLY AFTER SUNRISE OR BEFORE SUNSET, DURING WHICH DAYLIGHT IS REDDER AND SOFTER 

BLUE HOUR - PERIOD OF TWILIGHT WHEN THE SUN IS AT A SIGNIFICANT DEPTH BELOW THE HORIZON AND RESIDUAL INDIRECT SUNLIGHT TAKES ON A PREDOMINANTLY BLUE SHADE. IT FOLLOWS AFTER OR BEFORE THE GOLDEN HOUR