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Recognised as Colour

#6600A4

  • #6600A4
  • Violet
  • Dark
  • Nearest: Indigo

#6600A4 is a violet with RGB values 102, 0, 164 and HSL 277°, 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

#6600A4#6600A4
HEX#6600A4
RGBrgb(102, 0, 164)
RGB (0–1)0.4, 0, 0.6431
RGB percentages40%, 0%, 64.3%
HSLhsl(277.3, 100%, 32.2%)
HSV / HSBhsv(277.3, 100%, 64.3%)
CMYK37.8%, 100%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,684,836
CSS custom property--colour: #6600A4;

Brightness & contrast

Relative luminance0.05505WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10:1
Contrast with white10:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#99FF5B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0040A8no red cones; affects about 1% of men; ΔE 35.9 from the original
Deuteranopia#0042A1no green cones; the most common form, about 1% of men; ΔE 40.5 from the original
Tritanopia#593B5Fno 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 text10:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Indigo · ΔE 15.2Dark orchid · ΔE 15.7Dark blue · ΔE 19Dark violet · ΔE 20.4Blue violet · ΔE 20.8Navy · ΔE 21.1
Nearest named CSS colourIndigo (#4B0082)ΔE 15.21, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3EA400
Analogous#1400A4, #A40090
Triadic#A46600, #00A466
Split complementary#90A400, #00A414
Tetradic#A41400, #3EA400, #0090A4

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C971FF
Lighter +30%#B63EFF
Lighter +20%#A30BFF
Lighter +10%#8600D7
Darker −10%#460071
Darker −20%#27003E
Darker −30%#07000B
Darker −40%#000000
More saturated +25%#6600A4
Less saturated −25%#611490

Channel breakdown

R102
G0
B164
Red102 (40%)
Green0 (0%)
Blue164 (64.3%)
Hue277.32°
Saturation (HSL)100%
Lightness32.16%
Dominant channelBlue
Hex per channelR 66 · G 00 · B A4

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Every value on this page was computed from “6600a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.