Many women are not into looking like a red packet during the lunar new year. Some will prefer subtle colors, though bear in mind that it is not easy to carry off pastel/light colors especially on photos. Most times, the person looks washed out in them. So, instead of red, I think blue is a really nice color. If you are adventurous, there is also purple, green, yellow, and of course, an offshoot of red, pink! Even black with splashes of red is acceptable as well.
There are many options for non-red cheongsams available right now, in various price range. Check out these if you want to be non-traditional!
Couture by Szan @ Changi Airport T3 (below S$100)
Mazzario @ One Raffles Place (from S$159)
Utopia @ Parkway Parade (below S$120)
Seoul Fashion @ Raffles Xchange (from S$129)
Nana @ Arcade (below S$200)
Miz Apparels @ One Raffles Place (below S$200)
Peter Kor @ Studio 55 (from S$250)
Y by Yann @ Isetan Scott (from S$329)
Lai Chan @ Raffles Hotel (from S$780)
Hana @ Arcade (from S$1,000)