Nice sky! If the front view of the 3 people were taken.. perhaps it would add their expressions to the pic... making it a little more interesting
What do you think?
This is because you took the picture in a gloomy day, in the early morning or in the early evening. At these times of the day, the ambiant light/sun light is a tad blue, something we seldom notice but when we look at a photo, we notice this.