Hi,
accidentally I found out that all the nice balloons and airplanes are pure white at dawn, dusk and night. I can only enjoy their rich colors at daytime.
That's not an issue for me and I found it when flying at dawn from Misty's Place to Annette Island. It's easy to reproduce, one need only to start the flight at PANT, pause and switch between the times.
I use FSX/DX10 with REX HD+ so it may happen because of DX10 and maybe only on my rig. I'm aware that Annette Island isn't prepared yet for DX10.
Thanks
Spirit