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Recognised as Colour

#143D80

  • #143D80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#143D80 is a blue with RGB values 20, 61, 128 and HSL 217°, 73%, 29%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#143D80#143D80
HEX#143D80
RGBrgb(20, 61, 128)
RGB (0–1)0.0784, 0.2392, 0.502
RGB percentages7.8%, 23.9%, 50.2%
HSLhsl(217.2, 73%, 29%)
HSV / HSBhsv(217.2, 84.4%, 50.2%)
CMYK84.4%, 52.3%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,326,464
CSS custom property--colour: #143D80;

Brightness & contrast

Relative luminance0.05045WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.45:1
Contrast with white10.45:1WCAG normal text: AAA
Contrast with black2.01:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#EBC27F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#124582no red cones; affects about 1% of men; ΔE 6.2 from the original
Deuteranopia#003B7Fno green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#004D58no blue cones; rare, and affects men and women equally; ΔE 41.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.45:1WCAG large text: AAA
Contrast with black, large text2.01:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.9Midnight blue · ΔE 23.3Rebecca purple · ΔE 31.2Steel blue · ΔE 32.1Slate blue · ΔE 33.8Royal blue · ΔE 34.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#805714
Analogous#147380, #211480
Triadic#80143D, #3D8014
Split complementary#802114, #738014
Tetradic#801473, #805714, #148021

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#76A2EA
Lighter +30%#4A84E3
Lighter +20%#2267D8
Lighter +10%#1B52AC
Darker −10%#0D2854
Darker −20%#061328
Darker −30%#000000
Darker −40%#000000
More saturated +25%#013993
Less saturated −25%#26416E

Channel breakdown

R20
G61
B128
Red20 (7.8%)
Green61 (23.9%)
Blue128 (50.2%)
Hue217.22°
Saturation (HSL)72.97%
Lightness29.02%
Dominant channelBlue
Hex per channelR 14 · G 3D · B 80

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Every value on this page was computed from “143d80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.