Match the temperatures
BALANCE OUT THE COLOUR TEMPERATURE BETWEEN THE FLASH AND THE SETTING SUN
Flashes usually have a white balance around 50006000 kelvin, which is similar to the colour of daylight at noon. This makes them handy for shooting outside during the day, but at sunset the colour of the light is around 3000 kelvin – much warmer. This variation between the flash and the ambient light can make the subject look unnaturally cool. We could fix a Colour Temperature Orange (CTO) gel over the flash bulb (a weak 1/4 CTO gel will give a hint of warmth). Some softboxes, like the Godox modifier here, allow you to fit a gold reflector inside the casing. Light takes on the colour of any surface it bounces off, so this gold disc can add a touch of warmth.