I originally had a white filter with a gray pre-filter, which looked great. When I upgraded to a blue allergen filter and purchased a 'sand' colored pre-filter to switch things up - I was disappointed to see that the blue filter shows through the pinkish sand color pre-filter! I don't like the way it looks. I tried to ask customer service what color pre-filter might cover up the blue color better, but they weren't much help. I don't want to pay for the navy blue special edition - it's expensive - and all of the other colors look pretty light as well. I wish there had been some kind of heads-up on the product page for the allergen filter that some colors of the pre-filter were not recommended.
