Hesaka Kimono Shop on Rakuten has several sets of graduation kimono and hakama, in many colors:
This gentle sprinkle of sakura flowers is the new standard. Hakama used to be strictly solid color, usually a dark and stoic shade like forest green or navy blue. These days, more fashion-forward designers are covering the whole hakama with flowers and prints, but small embroidered flowers are still popular across Japan.
This particular kimono is an uncommon color for kimono in general, not just graduation. The blue is a dark peacock blue, and the flowers range from mauve to dark burgundy. Not a drop of neon pink in sight! This kimono manages to be festive, formal and brightly designed without using any bright colors at all.