In this photo, the Sun appears to be trying to peek between the two banks of cumulonimbus (thunderstorm) clouds. But the cloudbanks overlap each other and the high cirrus clouds at the top of the other clouds is catching all the white light.
Taken at 7:54 PM
This was taken at five minutes past Sunset. The effect of the Sun trying to peek between the clouds has grown a lot fainter. The high cirrus clouds have appeared to have grown, but the cumulonimbus clouds from the right have occluded them.
Taken at 7:55 PM
One minute later. The cumulonimbus clouds have grown just a bit.