Yellow is a color associated with sun. It symbolizes optimism, energy, joy, happiness and friendship.
About the shirt
hipHop, hipster, hippie all derived from the word hip- which has various different meanings; Cool, or up on the latest thing, having knowledge of the latest trends in music, fashion, and speech.
Form-fitting but not overly tight. Retail fit, and a more fashion-forward option compared to the standard, boxy adult t-shirt.