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Recognised as Colour

#1520BB

  • #1520BB
  • Blue
  • Dark
  • Nearest: Dark blue

#1520BB is a blue with RGB values 21, 32, 187 and HSL 236°, 80%, 41%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#1520BB#1520BB
HEX#1520BB
RGBrgb(21, 32, 187)
RGB (0–1)0.0824, 0.1255, 0.7333
RGB percentages8.2%, 12.5%, 73.3%
HSLhsl(236, 79.8%, 40.8%)
HSV / HSBhsv(236, 88.8%, 73.3%)
CMYK88.8%, 82.9%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,384,635
CSS custom property--colour: #1520BB;

Brightness & contrast

Relative luminance0.0478WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.74:1
Contrast with white10.74:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#292929
Inverted#EADF44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0046BFno red cones; affects about 1% of men; ΔE 25.7 from the original
Deuteranopia#0035B8no green cones; the most common form, about 1% of men; ΔE 15.6 from the original
Tritanopia#005370no blue cones; rare, and affects men and women equally; ΔE 84.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.74:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark blue · ΔE 15.5Medium blue · ΔE 19Navy · ΔE 20.2Blue violet · ΔE 23.7Indigo · ΔE 26.3Dark violet · ΔE 28.3
Nearest named CSS colourDark blue (#00008B)ΔE 15.55, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BBB015
Analogous#1573BB, #5D15BB
Triadic#BB1520, #20BB15
Split complementary#BB5D15, #73BB15
Tetradic#BB1573, #BBB015, #15BB5D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7ACF5
Lighter +30%#7981F0
Lighter +20%#4B56EB
Lighter +10%#1D2BE6
Darker −10%#10188D
Darker −20%#0B105F
Darker −30%#060831
Darker −40%#000104
More saturated +25%#000ED0
Less saturated −25%#2F37A1

Channel breakdown

R21
G32
B187
Red21 (8.2%)
Green32 (12.5%)
Blue187 (73.3%)
Hue236.02°
Saturation (HSL)79.81%
Lightness40.78%
Dominant channelBlue
Hex per channelR 15 · G 20 · B BB

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Every value on this page was computed from “1520bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.