Brown
Brown was a color. It was used to describe skin, fur, hair (brunette), and eyes. One shade of brown was dark brown, another was beige. (; ; )

As a child, Guinan had an imaginary friend that was a Tarcassian razor beast. According to her, "It had dark brown fur and  eyes and huge spiny wings, and it would fly so fast nobody could see it except me." ()

The graduations of skin pigmentation from black to brown, to yellow to white, were genetically predictable and were given an explanation from the earliest writings on genetics by Gregor Johann Mendel to the most recent nucleotide studies. The rare exception was the Cheron natives who were black on one side and white on the other. ()

In 2152,  described tarrat-aash to Zho'Kaan as "that brown stuff you were drinking". ()

While playing the role of Dixon Hill, Jean-Luc Picard attempted to excuse himself from the holodeck in 2364, to Lieutenant McNary, stating that he had other duties. McNary, who assumed he meant he had a prior engagement with a woman, inquired whether she was blonde or brunette. ()

In 2366, when attempting to explain the nuances of language to Jean-Luc Picard, Deanna Troi mentioned a word and indicated Picard's Earl Grey tea, asking him what she meant. He suggested cup or , but she told him she could have just as easily meant "liquid, clear, brown, (or) hot". ()

When Doctor Beverly Crusher asked about Miles O'Brien about his injured elbow, he explained to her that it happened after a fall while he was hanging a plant for Keiko. O'Brien further explained that having him work with plants was "part of her running project to give me a green thumb," but he confessed that his luck has been the opposite and that "[e]verything I touch seems to turn brown and wither away." ()

When Deep Space 9 was visited by advanced aliens who were able to allow the crew of the station to conjured whatever they dreamt, Quark conjured two "trollops" who mysteriously disappeared. In his search for the women, Quark found Odo to report that they were missing, calling the two simply "a blonde and a brunette." ()

In describing Fenna to Constable Odo, he explained that she had "brown skin, dark hair." ()

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Colors