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Recognised as Colour

#3978D2

  • #3978D2
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3978D2 is a blue with RGB values 57, 120, 210 and HSL 215°, 63%, 52%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3978D2#3978D2
HEX#3978D2
RGBrgb(57, 120, 210)
RGB (0–1)0.2235, 0.4706, 0.8235
RGB percentages22.4%, 47.1%, 82.4%
HSLhsl(215.3, 63%, 52.4%)
HSV / HSBhsv(215.3, 72.9%, 82.4%)
CMYK72.9%, 42.9%, 0%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,766,482
CSS custom property--colour: #3978D2;

Brightness & contrast

Relative luminance0.18956WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.79:1
Contrast with white4.38:1WCAG normal text: Fail
Contrast with black4.79:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#C6872D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4C80D5no red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#3072D0no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#008D9Bno blue cones; rare, and affects men and women equally; ΔE 51.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.38:1WCAG large text: AA
Contrast with black, large text4.79:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.7Dodgerblue · ΔE 14.2Royal blue · ΔE 20.7Steel blue · ΔE 24.8Slate blue · ΔE 26.8Medium purple · ΔE 26.9
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D29339
Analogous#39C5D2, #4639D2
Triadic#D23978, #78D239
Split complementary#D24739, #C4D239
Tetradic#D239C5, #D29339, #39D247

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DFE9F8
Lighter +30%#B6CDEE
Lighter +20%#8CB1E5
Lighter +10%#6394DB
Darker −10%#2860B0
Darker −20%#1F4986
Darker −30%#15335D
Darker −40%#0C1C33
More saturated +25%#1B73F0
Less saturated −25%#577DB4

Channel breakdown

R57
G120
B210
Red57 (22.4%)
Green120 (47.1%)
Blue210 (82.4%)
Hue215.29°
Saturation (HSL)62.96%
Lightness52.35%
Dominant channelBlue
Hex per channelR 39 · G 78 · B D2

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Every value on this page was computed from “3978d2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.