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Recognised as Colour

#3F3FA8

  • #3F3FA8
  • Blue
  • Dark
  • Nearest: Slate blue

#3F3FA8 is a blue with RGB values 63, 63, 168 and HSL 240°, 45%, 45%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#3F3FA8#3F3FA8
HEX#3F3FA8
RGBrgb(63, 63, 168)
RGB (0–1)0.2471, 0.2471, 0.6588
RGB percentages24.7%, 24.7%, 65.9%
HSLhsl(240, 45.5%, 45.3%)
HSV / HSBhsv(240, 62.5%, 65.9%)
CMYK62.5%, 62.5%, 0%, 34.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,145,064
CSS custom property--colour: #3F3FA8;

Brightness & contrast

Relative luminance0.07439WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.44:1
Contrast with white8.44:1WCAG normal text: AAA
Contrast with black2.49:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#C0C057

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0052ABno red cones; affects about 1% of men; ΔE 18.1 from the original
Deuteranopia#0049A6no green cones; the most common form, about 1% of men; ΔE 13.6 from the original
Tritanopia#00596Dno blue cones; rare, and affects men and women equally; ΔE 61.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.44:1WCAG large text: AAA
Contrast with black, large text2.49:1WCAG large text: Fail

Named colours

Slate blue · ΔE 13.1Rebecca purple · ΔE 14Dark slateblue · ΔE 16Midnight blue · ΔE 18.3Royal blue · ΔE 18.5Medium slateblue · ΔE 22.9
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 13.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A8A83F
Analogous#3F74A8, #743FA8
Triadic#A83F3F, #3FA83F
Split complementary#A8743F, #74A83F
Tetradic#A83F74, #A8A83F, #3FA874

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8C8EB
Lighter +30%#A3A3DD
Lighter +20%#7E7ECF
Lighter +10%#5959C1
Darker −10%#313183
Darker −20%#23235E
Darker −30%#151539
Darker −40%#070714
More saturated +25%#2222C5
Less saturated −25%#5C5C8B

Channel breakdown

R63
G63
B168
Red63 (24.7%)
Green63 (24.7%)
Blue168 (65.9%)
Hue240°
Saturation (HSL)45.45%
Lightness45.29%
Dominant channelBlue
Hex per channelR 3F · G 3F · B A8

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Every value on this page was computed from “3f3fa8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.