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Colour

#31393D

  • #31393D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#31393D is a blue with RGB values 49, 57, 61 and HSL 200°, 11%, 22%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#31393D#31393D
HEX#31393D
RGBrgb(49, 57, 61)
RGB (0–1)0.1922, 0.2235, 0.2392
RGB percentages19.2%, 22.4%, 23.9%
HSLhsl(200, 10.9%, 21.6%)
HSV / HSBhsv(200, 19.7%, 23.9%)
CMYK19.7%, 6.6%, 0%, 76.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,225,917
CSS custom property--colour: #31393D;

Brightness & contrast

Relative luminance0.03916WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.78:1
Contrast with white11.78:1WCAG normal text: AAA
Contrast with black1.78:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#CEC6C2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#37393Dno red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#35373Dno green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#2E3A3Ano blue cones; rare, and affects men and women equally; ΔE 3.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.78:1WCAG large text: AAA
Contrast with black, large text1.78:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.3Dim grey · ΔE 21.5Black · ΔE 23.8Slate grey · ΔE 30.3Gray · ΔE 30.5Light slate grey · ΔE 33.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3D3531
Analogous#313D3B, #31333D
Triadic#3D3139, #393D31
Split complementary#3D3133, #3D3B31
Tetradic#3B313D, #3D3531, #333D31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#92A1A8
Lighter +30%#768891
Lighter +20%#5E6E76
Lighter +10%#485359
Darker −10%#1A1F21
Darker −20%#040404
Darker −30%#000000
Darker −40%#000000
More saturated +25%#233E4B
Less saturated −25%#373737

Channel breakdown

R49
G57
B61
Red49 (19.2%)
Green57 (22.4%)
Blue61 (23.9%)
Hue200°
Saturation (HSL)10.91%
Lightness21.57%
Dominant channelBlue
Hex per channelR 31 · G 39 · B 3D

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Every value on this page was computed from “31393d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.