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Recognised as Colour

#143B8A

  • #143B8A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#143B8A is a blue with RGB values 20, 59, 138 and HSL 220°, 75%, 31%. It is a dark colour, so white text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#143B8A#143B8A
HEX#143B8A
RGBrgb(20, 59, 138)
RGB (0–1)0.0784, 0.2314, 0.5412
RGB percentages7.8%, 23.1%, 54.1%
HSLhsl(220.2, 74.7%, 31%)
HSV / HSBhsv(220.2, 85.5%, 54.1%)
CMYK85.5%, 57.2%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,325,962
CSS custom property--colour: #143B8A;

Brightness & contrast

Relative luminance0.05112WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.38:1
Contrast with white10.38:1WCAG normal text: AAA
Contrast with black2.02:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#EBC475

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00468Dno red cones; affects about 1% of men; ΔE 8.9 from the original
Deuteranopia#003B88no green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#004F5Cno blue cones; rare, and affects men and women equally; ΔE 48.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.38:1WCAG large text: AAA
Contrast with black, large text2.02:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.3Midnight blue · ΔE 17.6Rebecca purple · ΔE 25.3Slate blue · ΔE 27.4Royal blue · ΔE 28.3Medium purple · ΔE 33.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.34, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A6314
Analogous#14768A, #28148A
Triadic#8A143B, #3B8A14
Split complementary#8A2814, #768A14
Tetradic#8A1476, #8A6314, #148A28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7EA2EC
Lighter +30%#5182E6
Lighter +20%#2562DF
Lighter +10%#1A4EB7
Darker −10%#0E285D
Darker −20%#071531
Darker −30%#010204
Darker −40%#000000
More saturated +25%#00349E
Less saturated −25%#284276

Channel breakdown

R20
G59
B138
Red20 (7.8%)
Green59 (23.1%)
Blue138 (54.1%)
Hue220.17°
Saturation (HSL)74.68%
Lightness30.98%
Dominant channelBlue
Hex per channelR 14 · G 3B · B 8A

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Every value on this page was computed from “143b8a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.