(yay i found it!) : belt ranks in martial arts.

Novice Students
White Belt – The color white signifies innocence, as that of the beginning student who has no previous knowledge of Tae Kwon Do.
Orange Belt – The color orange signifies the changes of Autumn, as the student's mind and body begin to develop and grow as a result of the new Tae Kwon Do experience.
Yellow Belt – The color yellow signifies the earth. The beginning student begins to create a firm foundation in Tae Kwon Do technique, just as a seed begins to expand its root system deep in the earth as it begins to grow.

Intermediate Students
Green Belt – The color green represents growth, like that of the green plant as it sprouts out of the ground. The student has built a firm foundation and now begins to grow in the art of Tae Kwon Do.
Blue Belt – The color blue represents the sky. Reminding the student to reach for the heavens and continue their Tae Kwon Do journey.
Purple Belt – The color purple represents the changing sky of dawn, as once again the student undergoes a new change and prepares for the transition to advanced student.

Advanced Students
Brown Belt – The color brown represents the ripening or maturing process as that of the advanced Tae Kwon Do student whose techniques are beginning to mature.
Red Belt – The color of blood signifies danger and is a warning to the student to temper her newly found skills and techniques with control and wisdom.
Senior Students
Black – The opposite of white signifies maturity and dignity, as that of a senior student of Tae Kwon Do who has learned the basic curriculum of Tae Kwon Do and is ready to become a true student of Tae Kwon Do.