oh i cant wait ..... silly question but there is lots of different colour ones? I love a purple one for the wifey haha
Generally they don't have too many different colors. They usually try to camouflage in some way so a lot depends on what colors you have in your tank. Some countries are able to get some that have a beautiful orange color and I know someone in Australia with a purple type colored one but they are unavailable in Canada. Currently in Canada you can get H. Kuda (almost all are not True Captive Bred), H. Comes (not True Captive bred) and H. Erectus (Many are True Captive bred if you go to the right places). True Captive bred seahorses are truly the way to go because they are raised in a home aquarium set up and are free of disease.
Mine are H. Erectus. They are black and white or brown and white for the most part but any of the female babies that I have put into my own DT have all turned white or pale yellow. 6 of my males are a pale brown/yellow with striped markings and they are all in one tank. I am still not sure why they have all changed to that color but I have my theories. a few days ago I put a black and white male in with them and he is changing to match them.

It generally doesn't matter what color they are when you buy them because they will change once you get them into your tank. Many people have been fooled paying big bucks for a specific color only to have it change color when they get into their tank and all of a sudden their seahorse looks just like all the rest.

It is often an experiment with different backgrounds or colored hitches to see what you will get. When you come to get yours I can tell you all about it if you like.