I ordered a set of the blue ones. In the picture they definitely looked lighter, more like a lavender. However, at least for the blue ones, the legends do oxidize very quickly, turning them black. I contacted the seller about it and he said it was a manufacturing problem with the blue set. Overall pretty solid caps for $14, so it's not too big of a deal.
Now those keycaps have a "dark on dark" effect that masks the legends whilst still keeping them visible enough, which is an interesting and a not-entirely-bad side effect, actually. However, it would have been nice to know that this would have happened before I had ordered them, but for $14 I'm not all up in arms about it.