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Recognised as Colour

#644AA7

  • #644AA7
  • Violet
  • Dark
  • Nearest: Rebecca purple

#644AA7 is a violet with RGB values 100, 74, 167 and HSL 257°, 39%, 47%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Rebecca purple.

Colour values

#644AA7#644AA7
HEX#644AA7
RGBrgb(100, 74, 167)
RGB (0–1)0.3922, 0.2902, 0.6549
RGB percentages39.2%, 29%, 65.5%
HSLhsl(256.8, 38.6%, 47.3%)
HSV / HSBhsv(256.8, 55.7%, 65.5%)
CMYK40.1%, 55.7%, 0%, 34.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,572,711
CSS custom property--colour: #644AA7;

Brightness & contrast

Relative luminance0.10397WCAG 2.x, 0 is black and 1 is white
Perceived brightness96.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.82:1
Contrast with white6.82:1WCAG normal text: AA
Contrast with black3.08:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#9BB558

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1D5CAAno red cones; affects about 1% of men; ΔE 23.5 from the original
Deuteranopia#2459A5no green cones; the most common form, about 1% of men; ΔE 22.7 from the original
Tritanopia#535E71no blue cones; rare, and affects men and women equally; ΔE 47.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.82:1WCAG large text: AAA
Contrast with black, large text3.08:1WCAG large text: AA

Named colours

Rebecca purple · ΔE 11.3Dark slateblue · ΔE 11.4Slate blue · ΔE 13.5Medium purple · ΔE 17.2Royal blue · ΔE 22Midnight blue · ΔE 22.9
Nearest named CSS colourRebecca purple (#663399)ΔE 11.27, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8DA74A
Analogous#4A5FA7, #924AA7
Triadic#A7644A, #4AA764
Split complementary#A7924A, #5FA74A
Tetradic#A74A5F, #8DA74A, #4AA792

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D9D2EB
Lighter +30%#BBAFDB
Lighter +20%#9D8BCC
Lighter +10%#7F68BC
Darker −10%#4F3A84
Darker −20%#3A2B60
Darker −30%#251B3D
Darker −40%#0F0B1A
More saturated +25%#572CC5
Less saturated −25%#716889

Channel breakdown

R100
G74
B167
Red100 (39.2%)
Green74 (29%)
Blue167 (65.5%)
Hue256.77°
Saturation (HSL)38.59%
Lightness47.25%
Dominant channelBlue
Hex per channelR 64 · G 4A · B A7

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Every value on this page was computed from “644aa7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.