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Recognised as Colour

#18216D

  • #18216D
  • Blue
  • Dark
  • Nearest: Midnight blue

#18216D is a blue with RGB values 24, 33, 109 and HSL 234°, 64%, 26%. It is a dark colour, so white text on it reaches 14.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#18216D#18216D
HEX#18216D
RGBrgb(24, 33, 109)
RGB (0–1)0.0941, 0.1294, 0.4275
RGB percentages9.4%, 12.9%, 42.7%
HSLhsl(233.6, 63.9%, 26.1%)
HSV / HSBhsv(233.6, 78%, 42.7%)
CMYK78%, 69.7%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,581,421
CSS custom property--colour: #18216D;

Brightness & contrast

Relative luminance0.02386WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.22:1
Contrast with white14.22:1WCAG normal text: AAA
Contrast with black1.48:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#E7DE92

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002F6Fno red cones; affects about 1% of men; ΔE 12.6 from the original
Deuteranopia#00276Cno green cones; the most common form, about 1% of men; ΔE 7.1 from the original
Tritanopia#003544no blue cones; rare, and affects men and women equally; ΔE 47 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.22:1WCAG large text: AAA
Contrast with black, large text1.48:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 8Dark slateblue · ΔE 13.8Rebecca purple · ΔE 23.6Indigo · ΔE 27.9Navy · ΔE 30Slate blue · ΔE 32.5
Nearest named CSS colourMidnight blue (#191970)ΔE 8.04, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6D6418
Analogous#184C6D, #39186D
Triadic#6D1821, #216D18
Split complementary#6D3918, #4C6D18
Tetradic#6D184C, #6D6418, #186D39

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#717DE0
Lighter +30%#4757D7
Lighter +20%#2A3AC1
Lighter +10%#212E97
Darker −10%#0F1443
Darker −20%#060819
Darker −30%#000000
Darker −40%#000000
More saturated +25%#07147E
Less saturated −25%#292E5C

Channel breakdown

R24
G33
B109
Red24 (9.4%)
Green33 (12.9%)
Blue109 (42.7%)
Hue233.65°
Saturation (HSL)63.91%
Lightness26.08%
Dominant channelBlue
Hex per channelR 18 · G 21 · B 6D

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Every value on this page was computed from “18216d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.