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Recognised as Colour

#3939AA

  • #3939AA
  • Blue
  • Dark
  • Nearest: Slate blue

#3939AA is a blue with RGB values 57, 57, 170 and HSL 240°, 50%, 45%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#3939AA#3939AA
HEX#3939AA
RGBrgb(57, 57, 170)
RGB (0–1)0.2235, 0.2235, 0.6667
RGB percentages22.4%, 22.4%, 66.7%
HSLhsl(240, 49.8%, 44.5%)
HSV / HSBhsv(240, 66.5%, 66.7%)
CMYK66.5%, 66.5%, 0%, 33.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,750,314
CSS custom property--colour: #3939AA;

Brightness & contrast

Relative luminance0.06698WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.98:1
Contrast with white8.98:1WCAG normal text: AAA
Contrast with black2.34:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#C6C655

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004EAEno red cones; affects about 1% of men; ΔE 18 from the original
Deuteranopia#0044A8no green cones; the most common form, about 1% of men; ΔE 13 from the original
Tritanopia#00576Cno blue cones; rare, and affects men and women equally; ΔE 65.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.98:1WCAG large text: AAA
Contrast with black, large text2.34:1WCAG large text: Fail

Named colours

Slate blue · ΔE 14.5Rebecca purple · ΔE 15.1Midnight blue · ΔE 19.3Royal blue · ΔE 20Indigo · ΔE 20.2Dark slateblue · ΔE 21
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 14.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AAAA39
Analogous#3972AA, #7239AA
Triadic#AA3939, #39AA39
Split complementary#AA7239, #72AA39
Tetradic#AA3972, #AAAA39, #39AA72

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4C4EB
Lighter +30%#9E9EDE
Lighter +20%#7777D2
Lighter +10%#5151C5
Darker −10%#2C2C84
Darker −20%#1F1F5E
Darker −30%#131337
Darker −40%#060611
More saturated +25%#1D1DC6
Less saturated −25%#55558E

Channel breakdown

R57
G57
B170
Red57 (22.4%)
Green57 (22.4%)
Blue170 (66.7%)
Hue240°
Saturation (HSL)49.78%
Lightness44.51%
Dominant channelBlue
Hex per channelR 39 · G 39 · B AA

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Every value on this page was computed from “3939aa” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.