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Colour

#18155D

  • #18155D
  • Blue
  • Dark
  • Nearest: Midnight blue

#18155D is a blue with RGB values 24, 21, 93 and HSL 243°, 63%, 22%. It is a dark colour, so white text on it reaches 16.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#18155D#18155D
HEX#18155D
RGBrgb(24, 21, 93)
RGB (0–1)0.0941, 0.0824, 0.3647
RGB percentages9.4%, 8.2%, 36.5%
HSLhsl(242.5, 63.2%, 22.4%)
HSV / HSBhsv(242.5, 77.4%, 36.5%)
CMYK74.2%, 77.4%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,578,333
CSS custom property--colour: #18155D;

Brightness & contrast

Relative luminance0.01521WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.1:1
Contrast with white16.1:1WCAG normal text: AAA
Contrast with black1.3:1WCAG normal text: Fail
Greyscale equivalent#1B1B1B
Inverted#E7EAA2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00245Fno red cones; affects about 1% of men; ΔE 13.3 from the original
Deuteranopia#001E5Cno green cones; the most common form, about 1% of men; ΔE 9.5 from the original
Tritanopia#002937no blue cones; rare, and affects men and women equally; ΔE 45.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.1:1WCAG large text: AAA
Contrast with black, large text1.3:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 9.2Dark slateblue · ΔE 18.1Rebecca purple · ΔE 26Indigo · ΔE 28Navy · ΔE 30.3Dark blue · ΔE 35.3
Nearest named CSS colourMidnight blue (#191970)ΔE 9.21, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5A5D15
Analogous#15365D, #3C155D
Triadic#5D1815, #155D18
Split complementary#5D3C15, #365D15
Tetradic#5D1536, #5A5D15, #155D3C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6762DC
Lighter +30%#3F39D2
Lighter +20%#2D28B0
Lighter +10%#231E87
Darker −10%#0D0C33
Darker −20%#03020A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B076B
Less saturated −25%#25234F

Channel breakdown

R24
G21
B93
Red24 (9.4%)
Green21 (8.2%)
Blue93 (36.5%)
Hue242.5°
Saturation (HSL)63.16%
Lightness22.35%
Dominant channelBlue
Hex per channelR 18 · G 15 · B 5D

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Every value on this page was computed from “18155d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.