In the old days the white belt was simply dyed to a new color. This repeated dying process dictates the type of belt color and the order of the colors. The standard belt color system is white, yellow, orange, green, blue, brown, black. Some Karate school and styles, the color order is difference.

The grading system in Karate has been introduced for a variety of reasons. In modern day, it is a sign of having achieved a particular skill level, which gives the student an indication on how they are progressing. As a visible sign, the color of one's belt lets other students in the class know what skill level to expect from their fellow students. This makes partner training easier, and the newer students know where to look for the more experienced students.

Traditionally in most Karate styles, there are 9 stages where students go from 9th kyu (kyu means student) to 1st Kyu wearing colored belts, and ultimately become 1st Dan (Black belt).The grading procedure typically involves a training session where experienced Karateka (typically black belts from 1st Dan onwards) examine the performance of the students, including basic techniques, Kata, and sparring.

In general, the further you advance in the study of Karate, the more precision and also fighting spirit is expected in the performance of all techniques. Familiarity with Dojo etiquette and also a good grasp of the Japanese terminology is also increasingly expected. Katas play an important role in Goju-Ryu Karate-do.