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Colour

#181E2F

  • #181E2F
  • Blue
  • Dark
  • Nearest: Black

#181E2F is a blue with RGB values 24, 30, 47 and HSL 224°, 32%, 14%. It is a dark colour, so white text on it reaches 16.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#181E2F#181E2F
HEX#181E2F
RGBrgb(24, 30, 47)
RGB (0–1)0.0941, 0.1176, 0.1843
RGB percentages9.4%, 11.8%, 18.4%
HSLhsl(224.3, 32.4%, 13.9%)
HSV / HSBhsv(224.3, 48.9%, 18.4%)
CMYK48.9%, 36.2%, 0%, 81.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,591
CSS custom property--colour: #181E2F;

Brightness & contrast

Relative luminance0.01328WCAG 2.x, 0 is black and 1 is white
Perceived brightness30.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.59:1
Contrast with white16.59:1WCAG normal text: AAA
Contrast with black1.27:1WCAG normal text: Fail
Greyscale equivalent#1E1E1E
Inverted#E7E1D0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#182030no red cones; affects about 1% of men; ΔE 1.4 from the original
Deuteranopia#161E2Fno green cones; the most common form, about 1% of men; ΔE 0.7 from the original
Tritanopia#102124no blue cones; rare, and affects men and women equally; ΔE 11.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.59:1WCAG large text: AAA
Contrast with black, large text1.27:1WCAG large text: Fail

Named colours

Black · ΔE 17Dark slate grey · ΔE 26Dim grey · ΔE 35.2Slate grey · ΔE 41.7Dark slateblue · ΔE 42.5Gray · ΔE 43.9
Nearest named CSS colourBlack (#000000)ΔE 16.97, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2F2918
Analogous#182A2F, #1D182F
Triadic#2F181E, #1E2F18
Split complementary#2F1D18, #2A2F18
Tetradic#2F182A, #2F2918, #182F1D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6377B0
Lighter +30%#4C5F94
Lighter +20%#3A4973
Lighter +10%#293451
Darker −10%#07080D
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F1A38
Less saturated −25%#212226

Channel breakdown

R24
G30
B47
Red24 (9.4%)
Green30 (11.8%)
Blue47 (18.4%)
Hue224.35°
Saturation (HSL)32.39%
Lightness13.92%
Dominant channelBlue
Hex per channelR 18 · G 1E · B 2F

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Every value on this page was computed from “181e2f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.