When you open NailCatalog, you'll find a huge collection of manicures sorted according to base (one color, gradient, french or other) or color (pink, blue, purple, white/beige, yellow, green, gold, orange/brown, red, black, colorful and silver). The manicures are created by various nail salon's in Japan. So if you click on one design, you get to see a larger image of the mani and information of the nail salon that created it.
I used 3 coats of KIKO no. 204 to draw the clouds. KIKO no. 204 belongs to KIKO's French Manicure line, because it's a milky white sheer. I could have picked a white cream instead, but I wanted to create that dreamy feel to the clouds...not really sure I've managed to do so =S