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Recognised as Colour

#644AAE

  • #644AAE
  • Violet
  • Dark
  • Nearest: Slate blue

#644AAE is a violet with RGB values 100, 74, 174 and HSL 256°, 40%, 49%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#644AAE#644AAE
HEX#644AAE
RGBrgb(100, 74, 174)
RGB (0–1)0.3922, 0.2902, 0.6824
RGB percentages39.2%, 29%, 68.2%
HSLhsl(255.6, 40.3%, 48.6%)
HSV / HSBhsv(255.6, 57.5%, 68.2%)
CMYK42.5%, 57.5%, 0%, 31.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,572,718
CSS custom property--colour: #644AAE;

Brightness & contrast

Relative luminance0.10663WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.7:1
Contrast with white6.7:1WCAG normal text: AA
Contrast with black3.13:1WCAG normal text: Fail
Greyscale equivalent#575757
Inverted#9BB551

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F5DB1no red cones; affects about 1% of men; ΔE 24.3 from the original
Deuteranopia#185AACno green cones; the most common form, about 1% of men; ΔE 23.8 from the original
Tritanopia#4F6075no blue cones; rare, and affects men and women equally; ΔE 51 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.7:1WCAG large text: AAA
Contrast with black, large text3.13:1WCAG large text: AA

Named colours

Slate blue · ΔE 10.1Rebecca purple · ΔE 10.2Dark slateblue · ΔE 14.5Medium purple · ΔE 16.1Royal blue · ΔE 19.8Medium slateblue · ΔE 21.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 10.12, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#94AE4A
Analogous#4A62AE, #964AAE
Triadic#AE644A, #4AAE64
Split complementary#AE964A, #62AE4A
Tetradic#AE4A62, #94AE4A, #4AAE96

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DCD6EE
Lighter +30%#BEB3DE
Lighter +20%#A08FCF
Lighter +10%#816BC0
Darker −10%#4F3B8A
Darker −20%#3B2C66
Darker −30%#261C43
Darker −40%#120D1F
More saturated +25%#552BCD
Less saturated −25%#73698F

Channel breakdown

R100
G74
B174
Red100 (39.2%)
Green74 (29%)
Blue174 (68.2%)
Hue255.6°
Saturation (HSL)40.32%
Lightness48.63%
Dominant channelBlue
Hex per channelR 64 · G 4A · B AE

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