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Recognised as Colour

#2A09B2

  • #2A09B2
  • Blue
  • Dark
  • Nearest: Dark blue

#2A09B2 is a blue with RGB values 42, 9, 178 and HSL 252°, 90%, 37%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark blue.

Colour values

#2A09B2#2A09B2
HEX#2A09B2
RGBrgb(42, 9, 178)
RGB (0–1)0.1647, 0.0353, 0.698
RGB percentages16.5%, 3.5%, 69.8%
HSLhsl(251.7, 90.4%, 36.7%)
HSV / HSBhsv(251.7, 94.9%, 69.8%)
CMYK76.4%, 94.9%, 0%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,754,994
CSS custom property--colour: #2A09B2;

Brightness & contrast

Relative luminance0.03902WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.8:1
Contrast with white11.8:1WCAG normal text: AAA
Contrast with black1.78:1WCAG normal text: Fail
Greyscale equivalent#1C1C1C
Inverted#D5F64D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003FB6no red cones; affects about 1% of men; ΔE 30.2 from the original
Deuteranopia#0030AFno green cones; the most common form, about 1% of men; ΔE 21.7 from the original
Tritanopia#004968no blue cones; rare, and affects men and women equally; ΔE 86.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.8:1WCAG large text: AAA
Contrast with black, large text1.78:1WCAG large text: Fail

Named colours

Dark blue · ΔE 15.4Medium blue · ΔE 15.7Navy · ΔE 20.6Blue violet · ΔE 22Dark violet · ΔE 25Indigo · ΔE 26.1
Nearest named CSS colourDark blue (#00008B)ΔE 15.45, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#91B209
Analogous#093DB2, #7E09B2
Triadic#B22A09, #09B22A
Split complementary#B27E09, #3DB209
Tetradic#B2093D, #91B209, #09B27E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A38EF9
Lighter +30%#7B5DF7
Lighter +20%#542DF4
Lighter +10%#350BE3
Darker −10%#1F0781
Darker −20%#130451
Darker −30%#080220
Darker −40%#000000
More saturated +25%#2500BB
Less saturated −25%#38209B

Channel breakdown

R42
G9
B178
Red42 (16.5%)
Green9 (3.5%)
Blue178 (69.8%)
Hue251.72°
Saturation (HSL)90.37%
Lightness36.67%
Dominant channelBlue
Hex per channelR 2A · G 09 · B B2

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Every value on this page was computed from “2a09b2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.