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Recognised as Colour

#3F4766

  • #3F4766
  • Blue
  • Dark
  • Nearest: Dark slate grey

#3F4766 is a blue with RGB values 63, 71, 102 and HSL 228°, 24%, 32%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#3F4766#3F4766
HEX#3F4766
RGBrgb(63, 71, 102)
RGB (0–1)0.2471, 0.2784, 0.4
RGB percentages24.7%, 27.8%, 40%
HSLhsl(227.7, 23.6%, 32.4%)
HSV / HSBhsv(227.7, 38.2%, 40%)
CMYK38.2%, 30.4%, 0%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,147,046
CSS custom property--colour: #3F4766;

Brightness & contrast

Relative luminance0.06523WCAG 2.x, 0 is black and 1 is white
Perceived brightness73 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.11:1
Contrast with white9.11:1WCAG normal text: AAA
Contrast with black2.3:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#C0B899

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D4A67no red cones; affects about 1% of men; ΔE 2.5 from the original
Deuteranopia#3A4765no green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#344D52no blue cones; rare, and affects men and women equally; ΔE 18.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.11:1WCAG large text: AAA
Contrast with black, large text2.3:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 23Dim grey · ΔE 24.1Slate grey · ΔE 24.9Steel blue · ΔE 27Light slate grey · ΔE 27.5Gray · ΔE 30.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 22.97, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#665E3F
Analogous#3F5B66, #4A3F66
Triadic#663F47, #47663F
Split complementary#664A3F, #5A663F
Tetradic#663F5B, #665E3F, #3F664A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A8AFC9
Lighter +30%#8892B6
Lighter +20%#6975A2
Lighter +10%#525D86
Darker −10%#2C3146
Darker −20%#181B27
Darker −30%#050507
Darker −40%#000000
More saturated +25%#2A3B7B
Less saturated −25%#525252

Channel breakdown

R63
G71
B102
Red63 (24.7%)
Green71 (27.8%)
Blue102 (40%)
Hue227.69°
Saturation (HSL)23.64%
Lightness32.35%
Dominant channelBlue
Hex per channelR 3F · G 47 · B 66

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Every value on this page was computed from “3f4766” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.