#3f6378 - Mallard Blue color

A cool, muted slate-blue with subtle teal undertones, this color feels both oceanic and sophisticated. It evokes calm, stability, and a hint of evening sky—serene yet assertive. Ideal for interiors, corporate identities, and UI backgrounds where professionalism and tranquility are desired. It pairs beautifully with warm creams, brass or wood accents, and brighter coral or mustard highlights for contrast. Works well in matte fabrics, painted walls, or metallic finishes for a refined, modern palette.

color #3f6378

#3f6378 color RGB value is 63, 99, 120, and the CMYK value is 0.475, 0.175, 0.00, 0.529. Alternative names for that color are: mallard blue, gray, slategray, blue bayoux, outer space, indigo, slategrey.

Color Conversion

Name
Values
CSS
RGB(0-255)
63, 99, 120
rgb(63, 99, 120)
CMYK
0.475, 0.175, 0.00, 0.529
-
sRGB
0.247, 0.388, 0.471
rgb(24.7% 38.8% 47.1%)
Adobe® 98 RGB compatible
0.301, 0.388, 0.465
color(a98-rgb 0.301 0.388 0.465)
HCT
235, 25.0, 40.1
color(--hct 235 17.3% 40.1%)
HSL
202, 31.1, 35.9
hsl(202 31.1% 35.9%)
HSV
202, 47.5, 47.1
color(--hsv 202 47.5% 47.1%)
HWB
202, 24.7, 52.9
hwb(202 24.7% 52.9%)
Lab
39.9, -8.72, -16.1
lab(39.9 -8.72 -16.1)
P3
0.278, 0.385, 0.462
color(display-p3 0.278 0.385 0.462)
XYZ D50
0.0966, 0.112, 0.147
color(xyz-d50 0.097 0.112 0.147)

Shades

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Tints

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Tones

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Color Harmonies

HEX:#3f6378
RGB:63 99 120
HSL:202.11deg 31.15% 35.88%
HEX:#78543f
RGB:120 84 63
HSL:22.11deg 31.15% 35.88%

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