#33476d - Hydrogen Blue color

A deep, muted slate-blue with strong navy and steel undertones. It reads cool and composed—reminiscent of stormy seas or twilight skies—balancing sobriety with subtle richness. The tone feels professional, trustworthy, and quietly sophisticated, making it suitable for corporate branding, user-interface backgrounds, or elegant interiors. It pairs well with warm neutrals, soft creams, brass accents, or lighter blues for contrast. Overall the color conveys calm authority, depth, and understated refinement.

#33476d color RGB value is 51, 71, 109, and the CMYK value is 0.532, 0.349, 0.00, 0.573. Alternative names for that color are: hydrogen blue, gray, steelblue, rhino, midnight blue, indigo.

Open Color Palette Builder Open Color Wheel

Color Conversion

Name	Values	CSS
RGB(0-255)	51, 71, 109	rgb(51, 71, 109)
CMYK	0.532, 0.349, 0.00, 0.573	-
sRGB	0.200, 0.278, 0.427	rgb(20%, 27.8%, 42.7%)
Adobe® 98 RGB compatible	0.236, 0.285, 0.421	color(a98-rgb, 0.236, 0.285, 0.421)
HCT	265, 29.4, 30.2	color(--hct, 265, 20.3%, 30.2%)
HSL	219, 36.2, 31.4	hsl(219, 36.2%, 31.4%)
HSV	219, 53.2, 42.7	color(--hsv, 219, 53.2%, 42.7%)
HWB	219, 20.0, 57.3	hwb(219, 20%, 57.3%)
Lab	29.9, 1.08, -24.9	lab(29.9%, 1.08, -24.9)
P3	0.216, 0.276, 0.416	color(display-p3, 0.216, 0.276, 0.416)
XYZ D50	0.0606, 0.0618, 0.116	color(xyz-d50, 0.061, 0.062, 0.116)