I have taken the time to call this web site I found about the damon system of braces. This is the information I was told.
Braces do not come in color it is the rubber bands that some braces use that are in color. So even though it looks like your braces are color it is the colored rubber bands used.
Now the Damon system does not use rubber bands much at all and only if necessary therefore you will not have color if no rubber bands are needed.
I have listed the web site below. They have of information about damon system so this may help you in knowing more about the type of braces you are getting.
I hope this helps