#2f3946 - Biro Blue color

This deep slate-blue gray reads as a cool, muted navy with smoky charcoal undertones and a whisper of green. It feels modern and restrained—suitable for corporate interfaces, dark backgrounds, and elegant exteriors. It provides strong contrast with white or ivory while remaining softer than pure black, and pairs beautifully with warm metallics like copper or brass, amber accents, and pale neutrals. The tone evokes overcast twilight: steady, professional, and quietly sophisticated.

color #2f3946

#2f3946 color RGB value is 47, 57, 70, and the CMYK value is 0.329, 0.186, 0.00, 0.725. Alternative names for that color are: biro blue, black, darkslategray, tuna, outer space, indigo, darkslategrey.

Color Conversion

Name
Values
CSS
RGB(0-255)
47, 57, 70
rgb(47, 57, 70)
CMYK
0.329, 0.186, 0.00, 0.725
-
sRGB
0.184, 0.224, 0.275
rgb(18.4% 22.4% 27.5%)
Adobe® 98 RGB compatible
0.209, 0.234, 0.279
color(a98-rgb 0.209 0.234 0.279)
HCT
254, 13.9, 23.6
color(--hct 254 9.57% 23.6%)
HSL
214, 19.7, 22.9
hsl(214 19.7% 22.9%)
HSV
214, 32.9, 27.5
color(--hsv 214 32.9% 27.5%)
HWB
214, 18.4, 72.5
hwb(214 18.4% 72.5%)
Lab
23.5, -1.58, -9.51
lab(23.5 -1.58 -9.51)
P3
0.192, 0.222, 0.270
color(display-p3 0.192 0.222 0.27)
XYZ D50
0.0369, 0.0394, 0.0481
color(xyz-d50 0.037 0.039 0.048)

Shades

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Tints

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Tones

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Color Harmonies

HEX:#2f3946
RGB:47 57 70
HSL:213.91deg 19.66% 22.94%
HEX:#463c2f
RGB:70 60 47
HSL:33.91deg 19.66% 22.94%

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