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Recognised as Colour

#3981D8

  • #3981D8
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3981D8 is a blue with RGB values 57, 129, 216 and HSL 213°, 67%, 54%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3981D8#3981D8
HEX#3981D8
RGBrgb(57, 129, 216)
RGB (0–1)0.2235, 0.5059, 0.8471
RGB percentages22.4%, 50.6%, 84.7%
HSLhsl(212.8, 67.1%, 53.5%)
HSV / HSBhsv(212.8, 73.6%, 84.7%)
CMYK73.6%, 40.3%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,768,792
CSS custom property--colour: #3981D8;

Brightness & contrast

Relative luminance0.21528WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.31:1
Contrast with white3.96:1WCAG normal text: Fail
Contrast with black5.31:1WCAG normal text: AA
Greyscale equivalent#787878
Inverted#C67E27

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5888DBno red cones; affects about 1% of men; ΔE 5.3 from the original
Deuteranopia#3E79D6no green cones; the most common form, about 1% of men; ΔE 5.8 from the original
Tritanopia#0095A2no blue cones; rare, and affects men and women equally; ΔE 49.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.96:1WCAG large text: AA
Contrast with black, large text5.31:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.9Dodgerblue · ΔE 14Steel blue · ΔE 21.9Royal blue · ΔE 24.6Medium purple · ΔE 29.8Slate blue · ΔE 30.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.9, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D89039
Analogous#39D0D8, #4139D8
Triadic#D83981, #81D839
Split complementary#D84039, #D1D839
Tetradic#D839D0, #D89039, #39D841

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E3EDFA
Lighter +30%#B9D2F1
Lighter +20%#8EB7E9
Lighter +10%#649CE0
Darker −10%#2568B9
Darker −20%#1C508F
Darker −30%#143864
Darker −40%#0B203A
More saturated +25%#1B7EF6
Less saturated −25%#5784BA

Channel breakdown

R57
G129
B216
Red57 (22.4%)
Green129 (50.6%)
Blue216 (84.7%)
Hue212.83°
Saturation (HSL)67.09%
Lightness53.53%
Dominant channelBlue
Hex per channelR 39 · G 81 · B D8

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Every value on this page was computed from “3981d8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.