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Recognised as Colour

#6600A3

  • #6600A3
  • Violet
  • Dark
  • Nearest: Indigo

#6600A3 is a violet with RGB values 102, 0, 163 and HSL 278°, 100%, 32%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Indigo.

Colour values

#6600A3#6600A3
HEX#6600A3
RGBrgb(102, 0, 163)
RGB (0–1)0.4, 0, 0.6392
RGB percentages40%, 0%, 63.9%
HSLhsl(277.5, 100%, 32%)
HSV / HSBhsv(277.5, 100%, 63.9%)
CMYK37.4%, 100%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,684,835
CSS custom property--colour: #6600A3;

Brightness & contrast

Relative luminance0.05469WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.03:1
Contrast with white10.03:1WCAG normal text: AAA
Contrast with black2.09:1WCAG normal text: Fail
Greyscale equivalent#212121
Inverted#99FF5C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0040A7no red cones; affects about 1% of men; ΔE 36.1 from the original
Deuteranopia#0042A0no green cones; the most common form, about 1% of men; ΔE 40.7 from the original
Tritanopia#5A3B5Eno blue cones; rare, and affects men and women equally; ΔE 61.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.03:1WCAG large text: AAA
Contrast with black, large text2.09:1WCAG large text: Fail

Named colours

Indigo · ΔE 14.8Dark orchid · ΔE 15.8Dark blue · ΔE 18.9Dark violet · ΔE 20.8Navy · ΔE 21Blue violet · ΔE 21.3
Nearest named CSS colourIndigo (#4B0082)ΔE 14.78, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3DA300
Analogous#1500A3, #A3008E
Triadic#A36600, #00A366
Split complementary#8EA300, #00A315
Tetradic#A31500, #3DA300, #008EA3

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C970FF
Lighter +30%#B63DFF
Lighter +20%#A30AFF
Lighter +10%#8600D6
Darker −10%#460070
Darker −20%#26003D
Darker −30%#06000A
Darker −40%#000000
More saturated +25%#6600A3
Less saturated −25%#61148F

Channel breakdown

R102
G0
B163
Red102 (40%)
Green0 (0%)
Blue163 (63.9%)
Hue277.55°
Saturation (HSL)100%
Lightness31.96%
Dominant channelBlue
Hex per channelR 66 · G 00 · B A3

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Every value on this page was computed from “6600a3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.