I was checking out the latest ASOS edition on the iPhone app and LOVED the short ombre nail tutorial vid. I tried to find it online so that I could grab an embed code and stick it on here, but couldn't find it. So, here is a YouTube vid from OliviaMakeupChannel that (kind of) suffices:
In the ASOS video a blue/purple color was used on the bottom and a soft golden color was used on top at the tips. Using the same method as show in the above video, a sponge was used to apply the lighter color to the middle and tips of the nails. I really liked that color scheme.
I'm really just amazed that it's that simple. One fine day I'll give this a try. Doesn't seem like you can go too wrong with it.