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Recognised as Colour

#18174A

  • #18174A
  • Blue
  • Dark
  • Nearest: Midnight blue

#18174A is a blue with RGB values 24, 23, 74 and HSL 241°, 53%, 19%. It is a dark colour, so white text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#18174A#18174A
HEX#18174A
RGBrgb(24, 23, 74)
RGB (0–1)0.0941, 0.0902, 0.2902
RGB percentages9.4%, 9%, 29%
HSLhsl(241.2, 52.6%, 19%)
HSV / HSBhsv(241.2, 68.9%, 29%)
CMYK67.6%, 68.9%, 0%, 71%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,578,826
CSS custom property--colour: #18174A;

Brightness & contrast

Relative luminance0.01301WCAG 2.x, 0 is black and 1 is white
Perceived brightness33.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.66:1
Contrast with white16.66:1WCAG normal text: AAA
Contrast with black1.26:1WCAG normal text: Fail
Greyscale equivalent#1B1B1B
Inverted#E7E8B5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00204Cno red cones; affects about 1% of men; ΔE 9.8 from the original
Deuteranopia#001C49no green cones; the most common form, about 1% of men; ΔE 7.9 from the original
Tritanopia#00242Dno blue cones; rare, and affects men and women equally; ΔE 35.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.66:1WCAG large text: AAA
Contrast with black, large text1.26:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 22.7Dark slateblue · ΔE 23.4Rebecca purple · ΔE 36.1Black · ΔE 38.4Indigo · ΔE 40.7Navy · ΔE 44
Nearest named CSS colourMidnight blue (#191970)ΔE 22.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#494A17
Analogous#172F4A, #32174A
Triadic#4A1817, #174A18
Split complementary#4A3217, #304A17
Tetradic#4A172F, #494A17, #174A32

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6260CD
Lighter +30%#3E3BBF
Lighter +20%#312F98
Lighter +10%#252371
Darker −10%#0B0B23
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0C0B56
Less saturated −25%#24233E

Channel breakdown

R24
G23
B74
Red24 (9.4%)
Green23 (9%)
Blue74 (29%)
Hue241.18°
Saturation (HSL)52.58%
Lightness19.02%
Dominant channelBlue
Hex per channelR 18 · G 17 · B 4A

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Every value on this page was computed from “18174a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.