#3a4e5f - Cello color

A deep, muted slate-blue with subtle teal undertones, this color feels cool, maritime, and restrained. It evokes storm-tossed seas and worn industrial steel—calm, serious, and sophisticated. The greenish-blue cast lends depth without brightness, making it excellent for backgrounds, accent walls, or corporate identities seeking quiet authority. It pairs well with warm neutrals, soft creams, brass, or copper to add contrast, and with lighter blues or pale grays to maintain an elegant, modern palette.

#3a4e5f color RGB value is 58, 78, 95, and the CMYK value is 0.389, 0.179, 0.00, 0.627. Alternative names for that color are: cello, gray, darkslategray, oxford blue, outer space, indigo, darkslategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	58, 78, 95	rgb(58, 78, 95)
CMYK	0.389, 0.179, 0.00, 0.627	-
sRGB	0.227, 0.306, 0.373	rgb(22.7%, 30.6%, 37.3%)
Adobe® 98 RGB compatible	0.261, 0.310, 0.371	color(a98-rgb, 0.261, 0.31, 0.371)
HCT	244, 18.8, 32.2	color(--hct, 244, 13%, 32.2%)
HSL	208, 24.2, 30.0	hsl(208, 24.2%, 30%)
HSV	208, 38.9, 37.3	color(--hsv, 208, 38.9%, 37.3%)
HWB	208, 22.7, 62.7	hwb(208, 22.7%, 62.7%)
Lab	32.0, -4.39, -12.7	lab(32%, -4.39, -12.7)
P3	0.244, 0.304, 0.366	color(display-p3, 0.244, 0.304, 0.366)
XYZ D50	0.0642, 0.0710, 0.0897	color(xyz-d50, 0.064, 0.071, 0.09)