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Colour

#181F18

  • #181F18
  • Green
  • Dark
  • Nearest: Black

#181F18 is a green with RGB values 24, 31, 24 and HSL 120°, 13%, 11%. It is a dark colour, so white text on it reaches 16.8:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#181F18#181F18
HEX#181F18
RGBrgb(24, 31, 24)
RGB (0–1)0.0941, 0.1216, 0.0941
RGB percentages9.4%, 12.2%, 9.4%
HSLhsl(120, 12.7%, 10.8%)
HSV / HSBhsv(120, 22.6%, 12.2%)
CMYK22.6%, 0%, 22.6%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,824
CSS custom property--colour: #181F18;

Brightness & contrast

Relative luminance0.0124WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.83:1
Contrast with white16.83:1WCAG normal text: AAA
Contrast with black1.25:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#E7E0E7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1F1E18no red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#1E1D18no green cones; the most common form, about 1% of men; ΔE 4.4 from the original
Tritanopia#171F1Dno blue cones; rare, and affects men and women equally; ΔE 3.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.83:1WCAG large text: AAA
Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 12.5Dark slate grey · ΔE 22.7Dim grey · ΔE 34.1Gray · ΔE 43.2Dark olivegreen · ΔE 43.6Slate grey · ΔE 44.5
Nearest named CSS colourBlack (#000000)ΔE 12.53, a distinctly different colour
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1F181F
Analogous#1C1F18, #181F1C
Triadic#18181F, #1F1818
Split complementary#1C181F, #1F181C
Tetradic#181C1F, #1F181F, #1F1C18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#729172
Lighter +30%#5B755B
Lighter +20%#455845
Lighter +10%#2E3C2E
Darker −10%#020202
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#112611
Less saturated −25%#1C1C1C

Channel breakdown

R24
G31
B24
Red24 (9.4%)
Green31 (12.2%)
Blue24 (9.4%)
Hue120°
Saturation (HSL)12.73%
Lightness10.78%
Dominant channelGreen
Hex per channelR 18 · G 1F · B 18

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Every value on this page was computed from “181f18” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.