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Recognised as Colour

#3984D7

  • #3984D7
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3984D7 is a blue with RGB values 57, 132, 215 and HSL 212°, 66%, 53%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3984D7#3984D7
HEX#3984D7
RGBrgb(57, 132, 215)
RGB (0–1)0.2235, 0.5176, 0.8431
RGB percentages22.4%, 51.8%, 84.3%
HSLhsl(211.5, 66.4%, 53.3%)
HSV / HSBhsv(211.5, 73.5%, 84.3%)
CMYK73.5%, 38.6%, 0%, 15.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,769,559
CSS custom property--colour: #3984D7;

Brightness & contrast

Relative luminance0.22279WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.46:1
Contrast with white3.85:1WCAG normal text: Fail
Contrast with black5.46:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#C67B28

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5D8ADAno red cones; affects about 1% of men; ΔE 6 from the original
Deuteranopia#457BD5no green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#0098A3no blue cones; rare, and affects men and women equally; ΔE 48.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.85:1WCAG large text: AA
Contrast with black, large text5.46:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.8Dodgerblue · ΔE 15.9Steel blue · ΔE 19.3Royal blue · ΔE 27.6Deep skyblue · ΔE 29.7Medium purple · ΔE 32
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.84, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D78C39
Analogous#39D3D7, #3D39D7
Triadic#D73984, #84D739
Split complementary#D73D39, #D3D739
Tetradic#D739D3, #D78C39, #39D73D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E3EDF9
Lighter +30%#B8D3F1
Lighter +20%#8EB9E8
Lighter +10%#639EE0
Darker −10%#256BB8
Darker −20%#1D528D
Darker −30%#143A63
Darker −40%#0B2139
More saturated +25%#1B82F5
Less saturated −25%#5786B9

Channel breakdown

R57
G132
B215
Red57 (22.4%)
Green132 (51.8%)
Blue215 (84.3%)
Hue211.52°
Saturation (HSL)66.39%
Lightness53.33%
Dominant channelBlue
Hex per channelR 39 · G 84 · B D7

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Every value on this page was computed from “3984d7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.