Khaki is a color that has been used in armies for centuries. It's especially useful because it can be worn with any outfit, formal or informal due to its ability of complementing different colors easily without making too much noise about what you are wearing
Khakis have this type brownish tone at first glance but if one pays close enough attention they may notice green hints mixed into the drabness giving way some white highlights on occasion which helps make up for how dull these shades sometimes come off sounding when said aloud by someone unfamiliar with them before trying. Their bland appearance might lead people believe otherwise however; khakies do indeed possess distinct qualities regardless