Colour

#643F77

#643F77
Violet
Dark
Nearest: Dark slateblue

#643F77 is a violet with RGB values 100, 63, 119 and HSL 280°, 31%, 36%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#643F77#643F77

HEX#643F77

RGBrgb(100, 63, 119)

RGB (0–1)0.3922, 0.2471, 0.4667

RGB percentages39.2%, 24.7%, 46.7%

HSLhsl(279.6, 30.8%, 35.7%)

HSV / HSBhsv(279.6, 47.1%, 46.7%)

CMYK16%, 47.1%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer6,569,847

CSS custom property--colour: #643F77;

Brightness & contrast

Relative luminance0.07596WCAG 2.x, 0 is black and 1 is white

Perceived brightness83.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.34:1

Contrast with white8.34:1WCAG normal text: AAA

Contrast with black2.52:1WCAG normal text: Fail

Greyscale equivalent#4B4B4B

Inverted#9BC088

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#344C79no red cones; affects about 1% of men; ΔE 22 from the original

Deuteranopia#3E4F75no green cones; the most common form, about 1% of men; ΔE 22.7 from the original

Tritanopia#624755no blue cones; rare, and affects men and women equally; ΔE 25.6 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text8.34:1WCAG large text: AAA

Contrast with black, large text2.52:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.5 Rebecca purple · ΔE 26.5 Midnight blue · ΔE 29.7 Purple · ΔE 33.7 Medium purple · ΔE 34.1 Slate blue · ΔE 35.4

Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.47, a distinctly different colour

Hue familyviolet

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#52773F

Analogous#483F77, #773F6E

Triadic#77643F, #3F7764

Split complementary#6E773F, #3F7748

Tetradic#77483F, #52773F, #3F6E77

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#C7AED4

Lighter +30%#B08DC2

Lighter +20%#996BB1

Lighter +10%#805198

Darker −10%#482D56

Darker −20%#2C1C34

Darker −30%#100A13

Darker −40%#000000

More saturated +25%#6B288E

Less saturated −25%#5D5660

Channel breakdown

R100

G63

B119

Red100 (39.2%)

Green63 (24.7%)

Blue119 (46.7%)

Hue279.64°

Saturation (HSL)30.77%

Lightness35.69%

Dominant channelBlue

Hex per channelR 64 · G 3F · B 77

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#643F77

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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