#2b3f5c - Antarctic Blue color

The color #2b3f5c is a deep, cool slate-blue with muted indigo undertones, leaning toward charcoal rather than bright navy. It feels moody and composed, evoking stormy twilight or aged denim. In design it reads as sophisticated and steady—great for professional branding, elegant interiors, and subdued web backgrounds. It pairs beautifully with warm wood, brass, blush pink, or soft mustard to add contrast and warmth while maintaining a refined, quietly dramatic atmosphere.

#2b3f5c color RGB value is 43, 63, 92, and the CMYK value is 0.533, 0.315, 0.00, 0.639. Alternative names for that color are: antarctic blue, black, darkslategray, rhino, midnight blue, indigo, darkslategrey.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	43, 63, 92	rgb(43, 63, 92)
CMYK	0.533, 0.315, 0.00, 0.639	-
sRGB	0.169, 0.247, 0.361	rgb(16.9%, 24.7%, 36.1%)
Adobe® 98 RGB compatible	0.207, 0.255, 0.358	color(a98-rgb, 0.207, 0.255, 0.358)
HCT	260, 25.1, 26.3	color(--hct, 260, 17.3%, 26.3%)
HSL	216, 36.3, 26.5	hsl(216, 36.3%, 26.5%)
HSV	216, 53.3, 36.1	color(--hsv, 216, 53.3%, 36.1%)
HWB	216, 16.9, 63.9	hwb(216, 16.9%, 63.9%)
Lab	26.0, -1.07, -20.1	lab(26%, -1.07, -20.1)
P3	0.185, 0.245, 0.352	color(display-p3, 0.185, 0.245, 0.352)
XYZ D50	0.0450, 0.0475, 0.0816	color(xyz-d50, 0.045, 0.047, 0.082)