Cool Beige is good, dust is not apparent on it. During rains, even mud does not spoil the look as much as it does on other colors.
White and Silver are the top auto colors for the last 3-4 years all around the world, silver more then white. White is easy to maintain, dust is not apparent but mud is, and is very easy to touch-up. Accessories also match white and black easily.
Azure Grey and Deep Blue are very nice colors, I think Liana looks best in these colors, but very difficult to maintain as dust is very prominent on them. Either be ready to clean your car 2-3 times a day, or if you have a driver then no problem.
Color is a personal choice, one color may be liked by one guy but hated by another. But keep in mind how easy it is to maintain too.
Avoid black, as Liana has comparitively smaller dimensions, and black looks good on bigger cars.
Ciao...make a good choice. My preference-Cool Beige.