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Recognised as Colour

#18277D

  • #18277D
  • Blue
  • Dark
  • Nearest: Midnight blue

#18277D is a blue with RGB values 24, 39, 125 and HSL 231°, 68%, 29%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#18277D#18277D
HEX#18277D
RGBrgb(24, 39, 125)
RGB (0–1)0.0941, 0.1529, 0.4902
RGB percentages9.4%, 15.3%, 49%
HSLhsl(231.1, 67.8%, 29.2%)
HSV / HSBhsv(231.1, 80.8%, 49%)
CMYK80.8%, 68.8%, 0%, 51%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,582,973
CSS custom property--colour: #18277D;

Brightness & contrast

Relative luminance0.03126WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.92:1
Contrast with white12.92:1WCAG normal text: AAA
Contrast with black1.63:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#E7D882

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003680no red cones; affects about 1% of men; ΔE 12.5 from the original
Deuteranopia#002D7Bno green cones; the most common form, about 1% of men; ΔE 7.2 from the original
Tritanopia#003E4Eno blue cones; rare, and affects men and women equally; ΔE 52.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.92:1WCAG large text: AAA
Contrast with black, large text1.63:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.4Dark slateblue · ΔE 13.2Rebecca purple · ΔE 20.1Indigo · ΔE 24.5Navy · ΔE 25.9Slate blue · ΔE 27.3
Nearest named CSS colourMidnight blue (#191970)ΔE 6.43, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7D6E18
Analogous#18597D, #3C187D
Triadic#7D1827, #277D18
Split complementary#7D3B18, #5A7D18
Tetradic#7D1859, #7D6E18, #187D3B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7B8BE6
Lighter +30%#5165DD
Lighter +20%#2842D3
Lighter +10%#2034A8
Darker −10%#101A52
Darker −20%#080C27
Darker −30%#000000
Darker −40%#000000
More saturated +25%#051A90
Less saturated −25%#2B346A

Channel breakdown

R24
G39
B125
Red24 (9.4%)
Green39 (15.3%)
Blue125 (49%)
Hue231.09°
Saturation (HSL)67.79%
Lightness29.22%
Dominant channelBlue
Hex per channelR 18 · G 27 · B 7D

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Every value on this page was computed from “18277d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.