Hi Margaret, I think of powder blue as more gray than baby blue. I tried to find some examples on the 'net to show you and realized just how subjective all this is! I'm influenced by ladies fashions and paint chips from paint stores and labs. I used to work as a research chemist in a paint lab. We had fun making up descriptive names, but they were hardly "official." One of our favorites was for an oil company which had to have all their paints tinted to one of five different greens. We called one of them "puke green."

Seriously though, there are millions of colors possible. What we know by certain names is just the particular advertising we've been exposed to. I think artists have names for the pigments they use, and many of the colors they create are somewhat standard.

Here's a link I found in which you can sort by name. (Don't ask me who came up with these names.) click here http://www.cythink.com/colors/webpalette.asp You'll see powder blue, and then below it somewhat, sky blue (which is my impression of baby blue.)

Mary