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Recognised as Colour

#3F3663

  • #3F3663
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3F3663 is a blue with RGB values 63, 54, 99 and HSL 252°, 29%, 30%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#3F3663#3F3663
HEX#3F3663
RGBrgb(63, 54, 99)
RGB (0–1)0.2471, 0.2118, 0.3882
RGB percentages24.7%, 21.2%, 38.8%
HSLhsl(252, 29.4%, 30%)
HSV / HSBhsv(252, 45.5%, 38.8%)
CMYK36.4%, 45.5%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,142,691
CSS custom property--colour: #3F3663;

Brightness & contrast

Relative luminance0.04596WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.94:1
Contrast with white10.94:1WCAG normal text: AAA
Contrast with black1.92:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#C0C99C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#283D65no red cones; affects about 1% of men; ΔE 10.5 from the original
Deuteranopia#283C62no green cones; the most common form, about 1% of men; ΔE 10.9 from the original
Tritanopia#363E47no blue cones; rare, and affects men and women equally; ΔE 25 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.94:1WCAG large text: AAA
Contrast with black, large text1.92:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20.4Midnight blue · ΔE 30.7Steel blue · ΔE 34.1Dim grey · ΔE 35.2Dark slate grey · ΔE 35.3Rebecca purple · ΔE 35.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5A6336
Analogous#364363, #563663
Triadic#633F36, #36633F
Split complementary#635636, #446336
Tetradic#633643, #5A6336, #366356

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A59CC9
Lighter +30%#877BB7
Lighter +20%#695AA5
Lighter +10%#544884
Darker −10%#2A2442
Darker −20%#151221
Darker −30%#000000
Darker −40%#000000
More saturated +25%#342376
Less saturated −25%#4A4950

Channel breakdown

R63
G54
B99
Red63 (24.7%)
Green54 (21.2%)
Blue99 (38.8%)
Hue252°
Saturation (HSL)29.41%
Lightness30%
Dominant channelBlue
Hex per channelR 3F · G 36 · B 63

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Every value on this page was computed from “3f3663” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.