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Recognised as Colour

#644A83

  • #644A83
  • Violet
  • Dark
  • Nearest: Dark slateblue

#644A83 is a violet with RGB values 100, 74, 131 and HSL 267°, 28%, 40%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#644A83#644A83
HEX#644A83
RGBrgb(100, 74, 131)
RGB (0–1)0.3922, 0.2902, 0.5137
RGB percentages39.2%, 29%, 51.4%
HSLhsl(267.4, 27.8%, 40.2%)
HSV / HSBhsv(267.4, 43.5%, 51.4%)
CMYK23.7%, 43.5%, 0%, 48.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,572,675
CSS custom property--colour: #644A83;

Brightness & contrast

Relative luminance0.09246WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.37:1
Contrast with white7.37:1WCAG normal text: AAA
Contrast with black2.85:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#9BB57C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C5585no red cones; affects about 1% of men; ΔE 18 from the original
Deuteranopia#425681no green cones; the most common form, about 1% of men; ΔE 18.4 from the original
Tritanopia#5F5360no blue cones; rare, and affects men and women equally; ΔE 27.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.37:1WCAG large text: AAA
Contrast with black, large text2.85:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.4Rebecca purple · ΔE 27.6Midnight blue · ΔE 31Medium purple · ΔE 31.8Steel blue · ΔE 32Slate blue · ΔE 33.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.37, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#69834A
Analogous#4A4D83, #814A83
Triadic#83644A, #4A8364
Split complementary#83814A, #4D834A
Tetradic#834A4D, #69834A, #4A8381

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CBBEDB
Lighter +30%#B19EC8
Lighter +20%#977DB6
Lighter +10%#7D5DA3
Darker −10%#4B3862
Darker −20%#322542
Darker −30%#191321
Darker −40%#000001
More saturated +25%#62309D
Less saturated −25%#666469

Channel breakdown

R100
G74
B131
Red100 (39.2%)
Green74 (29%)
Blue131 (51.4%)
Hue267.37°
Saturation (HSL)27.8%
Lightness40.2%
Dominant channelBlue
Hex per channelR 64 · G 4A · B 83

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Every value on this page was computed from “644a83” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.