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Recognised as Colour

#18319C

  • #18319C
  • Blue
  • Dark
  • Nearest: Midnight blue

#18319C is a blue with RGB values 24, 49, 156 and HSL 229°, 73%, 35%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#18319C#18319C
HEX#18319C
RGBrgb(24, 49, 156)
RGB (0–1)0.0941, 0.1922, 0.6118
RGB percentages9.4%, 19.2%, 61.2%
HSLhsl(228.6, 73.3%, 35.3%)
HSV / HSBhsv(228.6, 84.6%, 61.2%)
CMYK84.6%, 68.6%, 0%, 38.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,585,564
CSS custom property--colour: #18319C;

Brightness & contrast

Relative luminance0.04791WCAG 2.x, 0 is black and 1 is white
Perceived brightness66 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.72:1
Contrast with white10.72:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#E7CE63

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00449Fno red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#00389Ano green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#004E62no blue cones; rare, and affects men and women equally; ΔE 62.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.72:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 14.9Rebecca purple · ΔE 18Slate blue · ΔE 19.7Dark slateblue · ΔE 19.9Navy · ΔE 20.3Indigo · ΔE 21.1
Nearest named CSS colourMidnight blue (#191970)ΔE 14.88, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9C8318
Analogous#18739C, #41189C
Triadic#9C1831, #319C18
Split complementary#9C4118, #739C18
Tetradic#9C1873, #9C8318, #189C41

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#92A3EE
Lighter +30%#667EE7
Lighter +20%#3959E1
Lighter +10%#1F3FC8
Darker −10%#112370
Darker −20%#0A1544
Darker −30%#040717
Darker −40%#000000
More saturated +25%#0123B3
Less saturated −25%#2E3F86

Channel breakdown

R24
G49
B156
Red24 (9.4%)
Green49 (19.2%)
Blue156 (61.2%)
Hue228.64°
Saturation (HSL)73.33%
Lightness35.29%
Dominant channelBlue
Hex per channelR 18 · G 31 · B 9C

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Every value on this page was computed from “18319c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.