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Recognised as Colour

#A640E4

  • #A640E4
  • Violet
  • Dark
  • Nearest: Dark orchid

#A640E4 is a violet with RGB values 166, 64, 228 and HSL 277°, 75%, 57%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Dark orchid.

Colour values

#A640E4#A640E4
HEX#A640E4
RGBrgb(166, 64, 228)
RGB (0–1)0.651, 0.251, 0.8941
RGB percentages65.1%, 25.1%, 89.4%
HSLhsl(277.3, 75.2%, 57.3%)
HSV / HSBhsv(277.3, 71.9%, 89.4%)
CMYK27.2%, 71.9%, 0%, 10.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,895,588
CSS custom property--colour: #A640E4;

Brightness & contrast

Relative luminance0.17375WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.69:1
Contrast with white4.69:1WCAG normal text: AA
Contrast with black4.48:1WCAG normal text: Fail
Greyscale equivalent#626262
Inverted#59BF1B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0070E9no red cones; affects about 1% of men; ΔE 47 from the original
Deuteranopia#1575E1no green cones; the most common form, about 1% of men; ΔE 52.6 from the original
Tritanopia#9D668Fno blue cones; rare, and affects men and women equally; ΔE 64.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.69:1WCAG large text: AAA
Contrast with black, large text4.48:1WCAG large text: AA

Named colours

Dark orchid · ΔE 7.6Blue violet · ΔE 12Dark violet · ΔE 13.9Medium orchid · ΔE 20.1Medium slateblue · ΔE 26.4Dark magenta · ΔE 31.2
Nearest named CSS colourDark orchid (#9932CC)ΔE 7.6, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7EE440
Analogous#5440E4, #E440D0
Triadic#E4A640, #40E4A6
Split complementary#D0E440, #40E454
Tetradic#E45440, #7EE440, #40D0E4

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F9F3FD
Lighter +30%#E4C6F7
Lighter +20%#D099F1
Lighter +10%#BB6DEA
Darker −10%#8F1ED3
Darker −20%#7018A6
Darker −30%#52117A
Darker −40%#340B4D
More saturated +25%#AD25FF
Less saturated −25%#9F5BC9

Channel breakdown

R166
G64
B228
Red166 (65.1%)
Green64 (25.1%)
Blue228 (89.4%)
Hue277.32°
Saturation (HSL)75.23%
Lightness57.25%
Dominant channelBlue
Hex per channelR A6 · G 40 · B E4

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Every value on this page was computed from “a640e4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.