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Recognised as Colour

#3731D1

  • #3731D1
  • Blue
  • Dark
  • Nearest: Blue violet

#3731D1 is a blue with RGB values 55, 49, 209 and HSL 242°, 63%, 51%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Blue violet.

Colour values

#3731D1#3731D1
HEX#3731D1
RGBrgb(55, 49, 209)
RGB (0–1)0.2157, 0.1922, 0.8196
RGB percentages21.6%, 19.2%, 82%
HSLhsl(242.2, 63.5%, 50.6%)
HSV / HSBhsv(242.2, 76.6%, 82%)
CMYK73.7%, 76.6%, 0%, 18%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,617,233
CSS custom property--colour: #3731D1;

Brightness & contrast

Relative luminance0.07612WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.33:1
Contrast with white8.33:1WCAG normal text: AAA
Contrast with black2.52:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#C8CE2E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0055D6no red cones; affects about 1% of men; ΔE 25.4 from the original
Deuteranopia#0046CEno green cones; the most common form, about 1% of men; ΔE 17.4 from the original
Tritanopia#006180no blue cones; rare, and affects men and women equally; ΔE 86.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.33:1WCAG large text: AAA
Contrast with black, large text2.52:1WCAG large text: Fail

Named colours

Blue violet · ΔE 19.6Medium blue · ΔE 19.7Dark blue · ΔE 21.9Dark orchid · ΔE 25.4Dark violet · ΔE 25.8Navy · ΔE 26.1
Nearest named CSS colourBlue violet (#8A2BE2)ΔE 19.61, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CBD131
Analogous#317BD1, #8731D1
Triadic#D13731, #31D137
Split complementary#D18731, #7BD131
Tetradic#D1317B, #CBD131, #31D187

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D9D8F6
Lighter +30%#B0AEED
Lighter +20%#8884E4
Lighter +10%#5F5BDA
Darker −10%#2B26A9
Darker −20%#201C80
Darker −30%#161356
Darker −40%#0B0A2C
More saturated +25%#1A11F1
Less saturated −25%#5451B2

Channel breakdown

R55
G49
B209
Red55 (21.6%)
Green49 (19.2%)
Blue209 (82%)
Hue242.25°
Saturation (HSL)63.49%
Lightness50.59%
Dominant channelBlue
Hex per channelR 37 · G 31 · B D1

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Every value on this page was computed from “3731d1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.