There is a difference in WB between the 2 shots but that's perfectly normal if your WB was preset to sunny and clouds covered the playing field at one point. In rapidly changing weather or environments, auto WB would probably have done better and/or shooting RAW. There is another important consideration also: The first shot in the clouds has a lot less contrast/more diffusion and that will also affect color rendition somewhat. The cast in the first shot does not appear to be major. I think that it could be easily corrected in post, contrast could also be added.
|Hot Air Balloons Over Bagan by User9320321874|
|Blue mood by darub|
from Fixed lens shootout.
|Yellow Warbler by LeeS|
from A Big Year - birds
|Waiting for the Parade by tcoker1103|
from - La Vida Loca - (Black and White Street Photography+ A Border)