Do the colors purple and blue match?

Without seeing the colors it is hard to say for sure. Colors have so many hues. Generally though brown goes well with green, purple, and blue. But, green and blue are hard colors together. But sometimes colors can surprising. I would recommend going to a craft store like Michael's or JoAnn's and buy a color wheel. They only cost a few dollars but give you an easy guide to what colors go well together.