Navy blue is making a comeback this year. Match it with a white/black top and you're good to go. 
 
Measurements : ( Free size ) Midi length 76cm, Maxi length 95cm 
waist 62cm - 76cm, highly stretchable 
( Plus size ) Midi length 76cm, Maxi length 95cm 
waist 78cm - 110cm highly stretchable 
 
Comes with an inner lining and two functional side pockets.