Dark blue looks really nice. Pity the Gecko waterproof is a somewhat un-sexy shade of blue, I got used to slim, shell type covers cause they're less bulky plus my reader travels in a sleeve inside my backpack. Just in case I fall from my bicycle.
Untill there's more choice I'll keep my cheap, 11€ chinese slim cover, but I ordered 2 skins too. The joys of impulse buying...