Colour

#181A39

#181A39
Blue
Dark
Nearest: Black

#181A39 is a blue with RGB values 24, 26, 57 and HSL 236°, 41%, 16%. It is a dark colour, so white text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#181A39#181A39

HEX#181A39

RGBrgb(24, 26, 57)

RGB (0–1)0.0941, 0.102, 0.2235

RGB percentages9.4%, 10.2%, 22.4%

HSLhsl(236.4, 40.7%, 15.9%)

HSV / HSBhsv(236.4, 57.9%, 22.4%)

CMYK57.9%, 54.4%, 0%, 77.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,579,577

CSS custom property--colour: #181A39;

Brightness & contrast

Relative luminance0.01228WCAG 2.x, 0 is black and 1 is white

Perceived brightness30.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.86:1

Contrast with white16.86:1WCAG normal text: AAA

Contrast with black1.25:1WCAG normal text: Fail

Greyscale equivalent#1C1C1C

Inverted#E7E5C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0D1E3Ano red cones; affects about 1% of men; ΔE 5.4 from the original

Deuteranopia#0A1C38no green cones; the most common form, about 1% of men; ΔE 5.3 from the original

Tritanopia#0B2126no blue cones; rare, and affects men and women equally; ΔE 21.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text16.86:1WCAG large text: AAA

Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 25.1 Dark slateblue · ΔE 33.7 Dark slate grey · ΔE 34 Midnight blue · ΔE 36.9 Dim grey · ΔE 40.6 Slate grey · ΔE 44.8

Nearest named CSS colourBlack (#000000)ΔE 25.07, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#393718

Analogous#182B39, #271839

Triadic#39181A, #1A3918

Split complementary#392718, #2A3918

Tetradic#39182B, #393718, #183927

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#6166BC

Lighter +30%#454BA5

Lighter +20%#363B81

Lighter +10%#272A5D

Darker −10%#090A15

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#0E1143

Less saturated −25%#22232F

Channel breakdown

R24

G26

B57

Red24 (9.4%)

Green26 (10.2%)

Blue57 (22.4%)

Hue236.36°

Saturation (HSL)40.74%

Lightness15.88%

Dominant channelBlue

Hex per channelR 18 · G 1A · B 39

Keep nerding

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#181A39

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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