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Recognised as Colour

#64387B

  • #64387B
  • Violet
  • Dark
  • Nearest: Dark slateblue

#64387B is a violet with RGB values 100, 56, 123 and HSL 279°, 37%, 35%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#64387B#64387B
HEX#64387B
RGBrgb(100, 56, 123)
RGB (0–1)0.3922, 0.2196, 0.4824
RGB percentages39.2%, 22%, 48.2%
HSLhsl(279.4, 37.4%, 35.1%)
HSV / HSBhsv(279.4, 54.5%, 48.2%)
CMYK18.7%, 54.5%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,568,059
CSS custom property--colour: #64387B;

Brightness & contrast

Relative luminance0.06968WCAG 2.x, 0 is black and 1 is white
Perceived brightness81 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.77:1
Contrast with white8.77:1WCAG normal text: AAA
Contrast with black2.39:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#9BC784

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#27487Dno red cones; affects about 1% of men; ΔE 25.8 from the original
Deuteranopia#354C79no green cones; the most common form, about 1% of men; ΔE 26.8 from the original
Tritanopia#624354no blue cones; rare, and affects men and women equally; ΔE 30.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.77:1WCAG large text: AAA
Contrast with black, large text2.39:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.1Rebecca purple · ΔE 19.8Midnight blue · ΔE 24.8Purple · ΔE 27.5Slate blue · ΔE 30.7Medium purple · ΔE 30.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.13, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4F7B38
Analogous#43387B, #7B3870
Triadic#7B6438, #387B64
Split complementary#707B38, #387B43
Tetradic#7B4338, #4F7B38, #38707B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7A8D7
Lighter +30%#B085C7
Lighter +20%#9A62B7
Lighter +10%#80489E
Darker −10%#482858
Darker −20%#2B1835
Darker −30%#0F0812
Darker −40%#000000
More saturated +25%#6B2291
Less saturated −25%#5D4E65

Channel breakdown

R100
G56
B123
Red100 (39.2%)
Green56 (22%)
Blue123 (48.2%)
Hue279.4°
Saturation (HSL)37.43%
Lightness35.1%
Dominant channelBlue
Hex per channelR 64 · G 38 · B 7B

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Every value on this page was computed from “64387b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.