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Recognised as Colour

#31343B

  • #31343B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#31343B is a blue with RGB values 49, 52, 59 and HSL 222°, 9%, 21%. It is a dark colour, so white text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#31343B#31343B
HEX#31343B
RGBrgb(49, 52, 59)
RGB (0–1)0.1922, 0.2039, 0.2314
RGB percentages19.2%, 20.4%, 23.1%
HSLhsl(222, 9.3%, 21.2%)
HSV / HSBhsv(222, 16.9%, 23.1%)
CMYK16.9%, 11.9%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,224,635
CSS custom property--colour: #31343B;

Brightness & contrast

Relative luminance0.03425WCAG 2.x, 0 is black and 1 is white
Perceived brightness52 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.46:1
Contrast with white12.46:1WCAG normal text: AAA
Contrast with black1.68:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#CECBC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#32343Bno red cones; affects about 1% of men; ΔE 0.4 from the original
Deuteranopia#31343Bno green cones; the most common form, about 1% of men; ΔE 0 from the original
Tritanopia#2F3536no blue cones; rare, and affects men and women equally; ΔE 4.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.46:1WCAG large text: AAA
Contrast with black, large text1.68:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15.6Black · ΔE 22.2Dim grey · ΔE 23.3Slate grey · ΔE 31.8Gray · ΔE 32.3Light slate grey · ΔE 34.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.55, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B3831
Analogous#31393B, #33313B
Triadic#3B3134, #343B31
Split complementary#3B3331, #393B31
Tetradic#3B3139, #3B3831, #313B33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9398A5
Lighter +30%#777E8E
Lighter +20%#5F6573
Lighter +10%#484D57
Darker −10%#1A1B1F
Darker −20%#030303
Darker −30%#000000
Darker −40%#000000
More saturated +25%#242F49
Less saturated −25%#363636

Channel breakdown

R49
G52
B59
Red49 (19.2%)
Green52 (20.4%)
Blue59 (23.1%)
Hue222°
Saturation (HSL)9.26%
Lightness21.18%
Dominant channelBlue
Hex per channelR 31 · G 34 · B 3B

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Every value on this page was computed from “31343b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.