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Recognised as Colour

#181EA0

  • #181EA0
  • Blue
  • Dark
  • Nearest: Dark blue

#181EA0 is a blue with RGB values 24, 30, 160 and HSL 237°, 74%, 36%. It is a dark colour, so white text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#181EA0#181EA0
HEX#181EA0
RGBrgb(24, 30, 160)
RGB (0–1)0.0941, 0.1176, 0.6275
RGB percentages9.4%, 11.8%, 62.7%
HSLhsl(237.4, 73.9%, 36.1%)
HSV / HSBhsv(237.4, 85%, 62.7%)
CMYK85%, 81.3%, 0%, 37.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,704
CSS custom property--colour: #181EA0;

Brightness & contrast

Relative luminance0.03661WCAG 2.x, 0 is black and 1 is white
Perceived brightness60.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.12:1
Contrast with white12.12:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#262626
Inverted#E7E15F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003DA4no red cones; affects about 1% of men; ΔE 22.1 from the original
Deuteranopia#002F9Eno green cones; the most common form, about 1% of men; ΔE 13.4 from the original
Tritanopia#004760no blue cones; rare, and affects men and women equally; ΔE 73.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.12:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark blue · ΔE 9.2Navy · ΔE 10.6Indigo · ΔE 16.8Rebecca purple · ΔE 24.1Midnight blue · ΔE 24.5Slate blue · ΔE 27
Nearest named CSS colourDark blue (#00008B)ΔE 9.25, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A09A18
Analogous#1862A0, #5618A0
Triadic#A0181E, #1EA018
Split complementary#A05618, #62A018
Tetradic#A01862, #A09A18, #18A056

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9599EF
Lighter +30%#696EE8
Lighter +20%#3C44E2
Lighter +10%#1F26CC
Darker −10%#111674
Darker −20%#0B0D47
Darker −30%#04051B
Darker −40%#000000
More saturated +25%#0109B7
Less saturated −25%#2F3389

Channel breakdown

R24
G30
B160
Red24 (9.4%)
Green30 (11.8%)
Blue160 (62.7%)
Hue237.35°
Saturation (HSL)73.91%
Lightness36.08%
Dominant channelBlue
Hex per channelR 18 · G 1E · B A0

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Every value on this page was computed from “181ea0” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.