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Recognised as Colour

#031B9B

  • #031B9B
  • Blue
  • Dark
  • Nearest: Dark blue

#031B9B is a blue with RGB values 3, 27, 155 and HSL 231°, 96%, 31%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#031B9B#031B9B
HEX#031B9B
RGBrgb(3, 27, 155)
RGB (0–1)0.0118, 0.1059, 0.6078
RGB percentages1.2%, 10.6%, 60.8%
HSLhsl(230.5, 96.2%, 31%)
HSV / HSBhsv(230.5, 98.1%, 60.8%)
CMYK98.1%, 82.6%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer203,675
CSS custom property--colour: #031B9B;

Brightness & contrast

Relative luminance0.0317WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.85:1
Contrast with white12.85:1WCAG normal text: AAA
Contrast with black1.63:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#FCE464

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00399Eno red cones; affects about 1% of men; ΔE 21.6 from the original
Deuteranopia#002A99no green cones; the most common form, about 1% of men; ΔE 11.7 from the original
Tritanopia#00445Cno blue cones; rare, and affects men and women equally; ΔE 73.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.85:1WCAG large text: AAA
Contrast with black, large text1.63:1WCAG large text: Fail

Named colours

Dark blue · ΔE 8.3Navy · ΔE 9.2Indigo · ΔE 16.9Midnight blue · ΔE 23.5Rebecca purple · ΔE 24.8Slate blue · ΔE 28.3
Nearest named CSS colourDark blue (#00008B)ΔE 8.33, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9B8303
Analogous#03679B, #37039B
Triadic#9B031B, #1B9B03
Split complementary#9B3703, #679B03
Tetradic#9B0367, #9B8303, #039B37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6E84FC
Lighter +30%#3C5AFB
Lighter +20%#0A30FA
Lighter +10%#0424CD
Darker −10%#021269
Darker −20%#010A37
Darker −30%#000105
Darker −40%#000000
More saturated +25%#00199E
Less saturated −25%#172987

Channel breakdown

R3
G27
B155
Red3 (1.2%)
Green27 (10.6%)
Blue155 (60.8%)
Hue230.53°
Saturation (HSL)96.2%
Lightness30.98%
Dominant channelBlue
Hex per channelR 03 · G 1B · B 9B

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Every value on this page was computed from “031b9b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.