#28589c - Cyan Cobalt Blue color

Deep, cool blue leaning toward a steel-navy with subtle teal undertones. It’s richly saturated without being harsh, conveying stability, professionalism, and calm depth—ideal for corporate identities, tech interfaces, and nautical themes. Against warm neutrals or pale corals it provides crisp contrast; paired with soft grays, warm beiges, or muted golds it reads sophisticated and grounded. Use for headers, call-to-action buttons, and accents when you want a confident, trustworthy color that remains modern and slightly maritime.

#28589c color RGB value is 40, 88, 156, and the CMYK value is 0.744, 0.436, 0.00, 0.388. Alternative names for that color are: cyan cobalt blue, gray, darkslateblue, st tropaz, denim, indigo.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	40, 88, 156	rgb(40, 88, 156)
CMYK	0.744, 0.436, 0.00, 0.388	-
sRGB	0.157, 0.345, 0.612	rgb(15.7%, 34.5%, 61.2%)
Adobe® 98 RGB compatible	0.239, 0.347, 0.598	color(a98-rgb, 0.239, 0.347, 0.598)
HCT	263, 45.7, 37.5	color(--hct, 263, 31.5%, 37.5%)
HSL	215, 59.2, 38.4	hsl(215, 59.2%, 38.4%)
HSV	215, 74.4, 61.2	color(--hsv, 215, 74.4%, 61.2%)
HWB	215, 15.7, 38.8	hwb(215, 15.7%, 38.8%)
Lab	36.9, 2.43, -42.6	lab(36.9%, 2.43, -42.6)
P3	0.205, 0.341, 0.593	color(display-p3, 0.205, 0.341, 0.593)
XYZ D50	0.0944, 0.0948, 0.247	color(xyz-d50, 0.094, 0.095, 0.247)