What kind of karate belts white yellow orange green blue brown black?

Most schools, or types, of Karate use the Kyu/Dan levels that started with Judo. The colors of the belts indicate what level the student is at. Most schools use the following colors - White, Yellow, Red, Green, Blue, Brown, Black. Once you reach Black, you then move to the Dan system. It then becomes Black Belt Dan 1st, Black Belt Dan 2nd, Black Belt Dan 3rd, up to Black Belt Dan 10th. So, to answer your question, technically the highest level belt would be Black Belt Dan 10th. In reality, each level that you attain is the highest because you have surpassed your previous best.