Sunil sahab is probably quoting paint finish quality, You find the issue in all colors.
The best color is probably White and Silver, I personally like the maroon too, The maroon is Suzukis signature color (pearl Red) I dont know why did they stop the strawberry red mettalic or Tomato Red in Japanese Alto, I mean Khyber and Mehran sold in good numbers in Red color.
Any way when booking Wagonr the dealership told me black and Maroon are mostly made on order.
I have only seen one black in display, But im not in favour of Paksuzukis Black color it fades away looses its shine after some time.
Havnt seen any beidge, The Blue is a decent color but not very attractive for karachi weather it cools pretty in over cast siutations like you would see this color very common in Japanese cars, UK, Singapore etc
Dont bother about resale, Choose what ever you like.