This concept has been around for years already and was very popular during the late 90s. Tribal concept is old school style which gives a more back "then" feeling compare to some of the concepts we seen nowadays.
Tribal design actually derives from tattoo arts or designs which are commonly seen. This concept can be achieved at its best if colors and design are a match and not to give a "beng" factor instead. Tribal concept can also be seen mixing with other concepts like track style for example then it will give a more refreshing look.