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Recognised as Colour

#3F4079

  • #3F4079
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3F4079 is a blue with RGB values 63, 64, 121 and HSL 239°, 32%, 36%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#3F4079#3F4079
HEX#3F4079
RGBrgb(63, 64, 121)
RGB (0–1)0.2471, 0.251, 0.4745
RGB percentages24.7%, 25.1%, 47.5%
HSLhsl(239, 31.5%, 36.1%)
HSV / HSBhsv(239, 47.9%, 47.5%)
CMYK47.9%, 47.1%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,145,273
CSS custom property--colour: #3F4079;

Brightness & contrast

Relative luminance0.06104WCAG 2.x, 0 is black and 1 is white
Perceived brightness72.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.46:1
Contrast with white9.46:1WCAG normal text: AAA
Contrast with black2.22:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#C0BF86

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#29487Bno red cones; affects about 1% of men; ΔE 9.8 from the original
Deuteranopia#254478no green cones; the most common form, about 1% of men; ΔE 9 from the original
Tritanopia#2B4C56no blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.46:1WCAG large text: AAA
Contrast with black, large text2.22:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.8Midnight blue · ΔE 26.8Steel blue · ΔE 30.4Rebecca purple · ΔE 30.7Slate blue · ΔE 35.7Cornflower blue · ΔE 36.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.75, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#79783F
Analogous#3F5D79, #5B3F79
Triadic#793F40, #40793F
Split complementary#795B3F, #5D793F
Tetradic#793F5D, #79783F, #3F795B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFAFD5
Lighter +30%#8D8EC4
Lighter +20%#6C6DB2
Lighter +10%#50529B
Darker −10%#2E2E57
Darker −20%#1C1D36
Darker −30%#0B0B14
Darker −40%#000000
More saturated +25%#282A90
Less saturated −25%#565662

Channel breakdown

R63
G64
B121
Red63 (24.7%)
Green64 (25.1%)
Blue121 (47.5%)
Hue238.97°
Saturation (HSL)31.52%
Lightness36.08%
Dominant channelBlue
Hex per channelR 3F · G 40 · B 79

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Every value on this page was computed from “3f4079” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.