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Recognised as Colour

#181D3C

  • #181D3C
  • Blue
  • Dark
  • Nearest: Black

#181D3C is a blue with RGB values 24, 29, 60 and HSL 232°, 43%, 16%. It is a dark colour, so white text on it reaches 16.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#181D3C#181D3C
HEX#181D3C
RGBrgb(24, 29, 60)
RGB (0–1)0.0941, 0.1137, 0.2353
RGB percentages9.4%, 11.4%, 23.5%
HSLhsl(231.7, 42.9%, 16.5%)
HSV / HSBhsv(231.7, 60%, 23.5%)
CMYK60%, 51.7%, 0%, 76.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,348
CSS custom property--colour: #181D3C;

Brightness & contrast

Relative luminance0.01399WCAG 2.x, 0 is black and 1 is white
Perceived brightness32.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.41:1
Contrast with white16.41:1WCAG normal text: AAA
Contrast with black1.28:1WCAG normal text: Fail
Greyscale equivalent#1E1E1E
Inverted#E7E2C3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#10213Dno red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#0C1E3Bno green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#082429no blue cones; rare, and affects men and women equally; ΔE 22.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.41:1WCAG large text: AAA
Contrast with black, large text1.28:1WCAG large text: Fail

Named colours

Black · ΔE 25.4Dark slate grey · ΔE 32.7Dark slateblue · ΔE 33.5Midnight blue · ΔE 37.2Dim grey · ΔE 39.4Slate grey · ΔE 43.5
Nearest named CSS colourBlack (#000000)ΔE 25.4, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3C3718
Analogous#182F3C, #25183C
Triadic#3C181D, #1D3C18
Split complementary#3C2518, #2F3C18
Tetradic#3C182F, #3C3718, #183C25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#606EC0
Lighter +30%#4452A9
Lighter +20%#354085
Lighter +10%#272F60
Darker −10%#090B18
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D1546
Less saturated −25%#222531

Channel breakdown

R24
G29
B60
Red24 (9.4%)
Green29 (11.4%)
Blue60 (23.5%)
Hue231.67°
Saturation (HSL)42.86%
Lightness16.47%
Dominant channelBlue
Hex per channelR 18 · G 1D · B 3C

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Every value on this page was computed from “181d3c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.