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Recognised as Colour

#3971FF

  • #3971FF
  • Blue
  • Dark
  • Nearest: Royal blue

#3971FF is a blue with RGB values 57, 113, 255 and HSL 223°, 100%, 61%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3971FF#3971FF
HEX#3971FF
RGBrgb(57, 113, 255)
RGB (0–1)0.2235, 0.4431, 1
RGB percentages22.4%, 44.3%, 100%
HSLhsl(223, 100%, 61.2%)
HSV / HSBhsv(223, 77.6%, 100%)
CMYK77.6%, 55.7%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,764,735
CSS custom property--colour: #3971FF;

Brightness & contrast

Relative luminance0.199WCAG 2.x, 0 is black and 1 is white
Perceived brightness126 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.98:1
Contrast with white4.22:1WCAG normal text: Fail
Contrast with black4.98:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#C68E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0085FFno red cones; affects about 1% of men; ΔE 17.6 from the original
Deuteranopia#0073FCno green cones; the most common form, about 1% of men; ΔE 5.4 from the original
Tritanopia#0094ADno blue cones; rare, and affects men and women equally; ΔE 76.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.22:1WCAG large text: AA
Contrast with black, large text4.98:1WCAG large text: AAA

Named colours

Royal blue · ΔE 12.2Medium slateblue · ΔE 14.3Slate blue · ΔE 19.7Dodgerblue · ΔE 25.7Medium purple · ΔE 26.5Cornflower blue · ΔE 35.8
Nearest named CSS colourRoyal blue (#4169E1)ΔE 12.19, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFC739
Analogous#39D4FF, #6439FF
Triadic#FF3971, #71FF39
Split complementary#FF6439, #D4FF39
Tetradic#FF39D4, #FFC739, #39FF64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D2DFFF
Lighter +20%#9FBAFF
Lighter +10%#6C96FF
Darker −10%#064CFF
Darker −20%#003BD2
Darker −30%#002D9F
Darker −40%#001F6C
More saturated +25%#3971FF
Less saturated −25%#527CE6

Channel breakdown

R57
G113
B255
Red57 (22.4%)
Green113 (44.3%)
Blue255 (100%)
Hue223.03°
Saturation (HSL)100%
Lightness61.18%
Dominant channelBlue
Hex per channelR 39 · G 71 · B FF

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Every value on this page was computed from “3971ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.