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Colour

#3997FF

  • #3997FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3997FF is a blue with RGB values 57, 151, 255 and HSL 212°, 100%, 61%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3997FF#3997FF
HEX#3997FF
RGBrgb(57, 151, 255)
RGB (0–1)0.2235, 0.5922, 1
RGB percentages22.4%, 59.2%, 100%
HSLhsl(211.5, 100%, 61.2%)
HSV / HSBhsv(211.5, 77.6%, 100%)
CMYK77.6%, 40.8%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,774,463
CSS custom property--colour: #3997FF;

Brightness & contrast

Relative luminance0.30223WCAG 2.x, 0 is black and 1 is white
Perceived brightness147.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.04:1
Contrast with white2.98:1WCAG normal text: Fail
Contrast with black7.04:1WCAG normal text: AAA
Greyscale equivalent#8B8B8B
Inverted#C66800

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#649FFFno red cones; affects about 1% of men; ΔE 7.2 from the original
Deuteranopia#418DFDno green cones; the most common form, about 1% of men; ΔE 7.4 from the original
Tritanopia#00B0BFno blue cones; rare, and affects men and women equally; ΔE 57.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.98:1WCAG large text: Fail
Contrast with black, large text7.04:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 5.1Cornflower blue · ΔE 10.2Royal blue · ΔE 23.8Medium purple · ΔE 31.1Steel blue · ΔE 31.2Deep skyblue · ΔE 32.4
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 5.11, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFA139
Analogous#39FAFF, #3E39FF
Triadic#FF3997, #97FF39
Split complementary#FF3E39, #FAFF39
Tetradic#FF39FA, #FFA139, #39FF3E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D2E7FF
Lighter +20%#9FCDFF
Lighter +10%#6CB2FF
Darker −10%#067CFF
Darker −20%#0064D2
Darker −30%#004B9F
Darker −40%#00336C
More saturated +25%#3997FF
Less saturated −25%#5298E6

Channel breakdown

R57
G151
B255
Red57 (22.4%)
Green151 (59.2%)
Blue255 (100%)
Hue211.52°
Saturation (HSL)100%
Lightness61.18%
Dominant channelBlue
Hex per channelR 39 · G 97 · B FF

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Every value on this page was computed from “3997ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.