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Recognised as Colour

#0B1531

  • #0B1531
  • Blue
  • Dark
  • Nearest: Black

#0B1531 is a blue with RGB values 11, 21, 49 and HSL 224°, 63%, 12%. It is a dark colour, so white text on it reaches 18:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#0B1531#0B1531
HEX#0B1531
RGBrgb(11, 21, 49)
RGB (0–1)0.0431, 0.0824, 0.1922
RGB percentages4.3%, 8.2%, 19.2%
HSLhsl(224.2, 63.3%, 11.8%)
HSV / HSBhsv(224.2, 77.6%, 19.2%)
CMYK77.6%, 57.1%, 0%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer726,321
CSS custom property--colour: #0B1531;

Brightness & contrast

Relative luminance0.00829WCAG 2.x, 0 is black and 1 is white
Perceived brightness23.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.01:1
Contrast with white18.01:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#151515
Inverted#F4EACE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#071832no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#021530no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#001B20no blue cones; rare, and affects men and women equally; ΔE 19.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.01:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Black · ΔE 22.4Dark slate grey · ΔE 34.3Dark slateblue · ΔE 37.4Midnight blue · ΔE 39.5Dim grey · ΔE 42.5Slate grey · ΔE 47.2
Nearest named CSS colourBlack (#000000)ΔE 22.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#31270B
Analogous#0B2831, #140B31
Triadic#310B15, #15310B
Split complementary#31140B, #28310B
Tetradic#310B28, #31270B, #0B3114

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#365FD2
Lighter +30%#274BAE
Lighter +20%#1E3984
Lighter +10%#14275B
Darker −10%#020307
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#041138
Less saturated −25%#121929

Channel breakdown

R11
G21
B49
Red11 (4.3%)
Green21 (8.2%)
Blue49 (19.2%)
Hue224.21°
Saturation (HSL)63.33%
Lightness11.76%
Dominant channelBlue
Hex per channelR 0B · G 15 · B 31

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Every value on this page was computed from “0b1531” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.