Coffee (#6F4E37) is a dark, muted brown hue. Coffee brown is a roasted, medium-dark brown; a natural fit for cafe and roastery branding.
In RGB it is made of 111 red, 78 green and 55 blue. Its HSL hue angle is 25° with 34% saturation and 33% lightness, while its perceptual OKLCH lightness is 45% with a chroma of 0.057. For print, a starting CMYK mix is 0% cyan, 30% magenta, 50% yellow and 56% black.
As a text color on white, Coffee has a contrast ratio of 7.44:1, which passes WCAG AA for normal text. On black it reaches 2.82:1 and fails AA. If you use Coffee as a background, put white text on it. The APCA lightness contrast is Lc 18 for black text and Lc -91 for white text.
Its perceptual complement is #355B72, close to charcoal. Colors that look most similar are chocolate, eggplant, brown. It looks fairly similar to people with red-green color blindness (ΔE 4), so its meaning mostly survives.