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Recognised as Colour

#8100A9

  • #8100A9
  • Violet
  • Dark
  • Nearest: Dark orchid

#8100A9 is a violet with RGB values 129, 0, 169 and HSL 286°, 100%, 33%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Dark orchid.

Colour values

#8100A9#8100A9
HEX#8100A9
RGBrgb(129, 0, 169)
RGB (0–1)0.5059, 0, 0.6627
RGB percentages50.6%, 0%, 66.3%
HSLhsl(285.8, 100%, 33.1%)
HSV / HSBhsv(285.8, 100%, 66.3%)
CMYK23.7%, 100%, 0%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,454,313
CSS custom property--colour: #8100A9;

Brightness & contrast

Relative luminance0.07532WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.38:1
Contrast with white8.38:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#7EFF56

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0048ADno red cones; affects about 1% of men; ΔE 43.6 from the original
Deuteranopia#0050A6no green cones; the most common form, about 1% of men; ΔE 52.1 from the original
Tritanopia#7D3962no blue cones; rare, and affects men and women equally; ΔE 55.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.38:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail

Named colours

Dark orchid · ΔE 11Dark magenta · ΔE 18.1Dark violet · ΔE 18.4Indigo · ΔE 19.4Blue violet · ΔE 20.8Purple · ΔE 21.5
Nearest named CSS colourDark orchid (#9932CC)ΔE 11.04, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#28A900
Analogous#2C00A9, #A9007D
Triadic#A98100, #00A981
Split complementary#7DA900, #00A92C
Tetradic#A92C00, #28A900, #007DA9

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DF76FF
Lighter +30%#D343FF
Lighter +20%#C610FF
Lighter +10%#A800DC
Darker −10%#5A0076
Darker −20%#330043
Darker −30%#0C0010
Darker −40%#000000
More saturated +25%#8100A9
Less saturated −25%#761594

Channel breakdown

R129
G0
B169
Red129 (50.6%)
Green0 (0%)
Blue169 (66.3%)
Hue285.8°
Saturation (HSL)100%
Lightness33.14%
Dominant channelBlue
Hex per channelR 81 · G 00 · B A9

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Every value on this page was computed from “8100a9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.