Color symbolism is the use of color as a representation or meaning of something that is usually specific to a particular culture or society. Context, culture and time are certainly important factors to consider when thinking about color symbolism.
Definition of backpack for English Language Learners. : a bag for carrying things that has two shoulder straps and is carried on the back.
Definition of vest 1 a: a sleeveless garment for the upper body usually worn over a shirt b: a protective usually sleeveless garment (such as a life preserver) that extends to the waist