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Recognised as Colour

#644F78

  • #644F78
  • Violet
  • Dark
  • Nearest: Dark slateblue

#644F78 is a violet with RGB values 100, 79, 120 and HSL 271°, 21%, 39%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#644F78#644F78
HEX#644F78
RGBrgb(100, 79, 120)
RGB (0–1)0.3922, 0.3098, 0.4706
RGB percentages39.2%, 31%, 47.1%
HSLhsl(270.7, 20.6%, 39%)
HSV / HSBhsv(270.7, 34.2%, 47.1%)
CMYK16.7%, 34.2%, 0%, 52.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,573,944
CSS custom property--colour: #644F78;

Brightness & contrast

Relative luminance0.09657WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.16:1
Contrast with white7.16:1WCAG normal text: AAA
Contrast with black2.93:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#9BB087

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#47577Ano red cones; affects about 1% of men; ΔE 14 from the original
Deuteranopia#4B5877no green cones; the most common form, about 1% of men; ΔE 14.3 from the original
Tritanopia#61555Eno blue cones; rare, and affects men and women equally; ΔE 19.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.16:1WCAG large text: AAA
Contrast with black, large text2.93:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 24.5Slate grey · ΔE 26.8Dim grey · ΔE 27.6Light slate grey · ΔE 28.6Steel blue · ΔE 29.1Gray · ΔE 31.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 24.49, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#63784F
Analogous#504F78, #784F78
Triadic#78644F, #4F7864
Split complementary#78784F, #4F784F
Tetradic#784F4F, #63784F, #4F7878

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CABED5
Lighter +30%#B0A0C0
Lighter +20%#9781AC
Lighter +10%#7E6397
Darker −10%#4A3B59
Darker −20%#31273A
Darker −30%#17121C
Darker −40%#000000
More saturated +25%#653691
Less saturated −25%#646464

Channel breakdown

R100
G79
B120
Red100 (39.2%)
Green79 (31%)
Blue120 (47.1%)
Hue270.73°
Saturation (HSL)20.6%
Lightness39.02%
Dominant channelBlue
Hex per channelR 64 · G 4F · B 78

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Every value on this page was computed from “644f78” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.