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Recognised as Colour

#2B2F37

  • #2B2F37
  • Blue
  • Dark
  • Nearest: Dark slate grey

#2B2F37 is a blue with RGB values 43, 47, 55 and HSL 220°, 12%, 19%. It is a dark colour, so white text on it reaches 13.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#2B2F37#2B2F37
HEX#2B2F37
RGBrgb(43, 47, 55)
RGB (0–1)0.1686, 0.1843, 0.2157
RGB percentages16.9%, 18.4%, 21.6%
HSLhsl(220, 12.2%, 19.2%)
HSV / HSBhsv(220, 21.8%, 21.6%)
CMYK21.8%, 14.5%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,830,135
CSS custom property--colour: #2B2F37;

Brightness & contrast

Relative luminance0.02822WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.42:1
Contrast with white13.42:1WCAG normal text: AAA
Contrast with black1.56:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#D4D0C8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D2F37no red cones; affects about 1% of men; ΔE 0.9 from the original
Deuteranopia#2B2E37no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#283132no blue cones; rare, and affects men and women equally; ΔE 5.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.42:1WCAG large text: AAA
Contrast with black, large text1.56:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.1Black · ΔE 20.1Dim grey · ΔE 25.7Slate grey · ΔE 34Gray · ΔE 34.7Light slate grey · ΔE 37.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.1, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#37332B
Analogous#2B3537, #2D2B37
Triadic#372B2F, #2F372B
Split complementary#372D2B, #35372B
Tetradic#372B35, #37332B, #2B372D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8A93A4
Lighter +30%#6E788D
Lighter +20%#586070
Lighter +10%#414754
Darker −10%#15171A
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1F2B43
Less saturated −25%#313131

Channel breakdown

R43
G47
B55
Red43 (16.9%)
Green47 (18.4%)
Blue55 (21.6%)
Hue220°
Saturation (HSL)12.24%
Lightness19.22%
Dominant channelBlue
Hex per channelR 2B · G 2F · B 37

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Every value on this page was computed from “2b2f37” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.