#3b638c - Mississippi River color

This is a deep, cool blue with subtle teal undertones and a slightly desaturated, slate-like quality. It reads as sophisticated and calming, evoking stormy seas or a twilight sky over water. In interiors and branding it conveys reliability and quiet elegance, pairing beautifully with warm neutrals, soft creams or copper accents for contrast. Under bright light it leans toward steel blue; in dimmer settings it feels almost charcoal. Ideal for professional, nautical, or contemplative palettes.

#3b638c color RGB value is 59, 99, 140, and the CMYK value is 0.579, 0.293, 0.00, 0.451. Alternative names for that color are: mississippi river, gray, steelblue, kashmir blue, midnight blue, indigo.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	59, 99, 140	rgb(59, 99, 140)
CMYK	0.579, 0.293, 0.00, 0.451	-
sRGB	0.231, 0.388, 0.549	rgb(23.1%, 38.8%, 54.9%)
Adobe® 98 RGB compatible	0.292, 0.388, 0.539	color(a98-rgb, 0.292, 0.388, 0.539)
HCT	252, 33.8, 40.8	color(--hct, 252, 23.3%, 40.8%)
HSL	210, 40.7, 39.0	hsl(210, 40.7%, 39%)
HSV	210, 57.9, 54.9	color(--hsv, 210, 57.9%, 54.9%)
HWB	210, 23.1, 45.1	hwb(210, 23.1%, 45.1%)
Lab	40.4, -4.71, -27.4	lab(40.4%, -4.71, -27.4)
P3	0.267, 0.384, 0.536	color(display-p3, 0.267, 0.384, 0.536)
XYZ D50	0.105, 0.115, 0.200	color(xyz-d50, 0.105, 0.115, 0.2)