#373e41 - Mine Shaft color

A deep, muted charcoal with cool slate undertones leaning toward green-blue. It reads as an urban stone tone—subtle, restrained, and sophisticated—ideal for backgrounds, UI elements, or modern interiors that require quiet depth. It pairs well with warm ochres, soft creams, and brass accents to add contrast, or with lighter grays and icy blues for a monochromatic, moody palette. The color evokes evening fog, worn metal, and industrial minimalism without feeling harsh.

#373e41 color RGB value is 55, 62, 65, and the CMYK value is 0.154, 0.0462, 0.00, 0.745. Alternative names for that color are: mine shaft, black, darkslategray, outer space, indigo, darkslategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	55, 62, 65	rgb(55, 62, 65)
CMYK	0.154, 0.0462, 0.00, 0.745	-
sRGB	0.216, 0.243, 0.255	rgb(21.6%, 24.3%, 25.5%)
Adobe® 98 RGB compatible	0.234, 0.252, 0.262	color(a98-rgb, 0.234, 0.252, 0.262)
HCT	223, 7.12, 25.7	color(--hct, 223, 4.91%, 25.7%)
HSL	198, 8.33, 23.5	hsl(198, 8.33%, 23.5%)
HSV	198, 15.4, 25.5	color(--hsv, 198, 15.4%, 25.5%)
HWB	198, 21.6, 74.5	hwb(198, 21.6%, 74.5%)
Lab	25.6, -2.46, -2.90	lab(25.6%, -2.46, -2.9)
P3	0.221, 0.242, 0.253	color(display-p3, 0.221, 0.242, 0.253)
XYZ D50	0.0428, 0.0462, 0.0430	color(xyz-d50, 0.043, 0.046, 0.043)