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Recognised as Colour

#66178E

  • #66178E
  • Violet
  • Dark
  • Nearest: Indigo

#66178E is a violet with RGB values 102, 23, 142 and HSL 280°, 72%, 32%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Indigo.

Colour values

#66178E#66178E
HEX#66178E
RGBrgb(102, 23, 142)
RGB (0–1)0.4, 0.0902, 0.5569
RGB percentages40%, 9%, 55.7%
HSLhsl(279.8, 72.1%, 32.4%)
HSV / HSBhsv(279.8, 83.8%, 55.7%)
CMYK28.2%, 83.8%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,690,702
CSS custom property--colour: #66178E;

Brightness & contrast

Relative luminance0.05391WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.11:1
Contrast with white10.11:1WCAG normal text: AAA
Contrast with black2.08:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#99E871

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003E91no red cones; affects about 1% of men; ΔE 34.5 from the original
Deuteranopia#00438Cno green cones; the most common form, about 1% of men; ΔE 40.2 from the original
Tritanopia#603654no blue cones; rare, and affects men and women equally; ΔE 48 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.11:1WCAG large text: AAA
Contrast with black, large text2.08:1WCAG large text: Fail

Named colours

Indigo · ΔE 8.7Rebecca purple · ΔE 10.8Purple · ΔE 14Dark magenta · ΔE 15Navy · ΔE 22.4Dark orchid · ΔE 23.2
Nearest named CSS colourIndigo (#4B0082)ΔE 8.74, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F8E17
Analogous#2A178E, #8E177B
Triadic#8E6617, #178E66
Split complementary#7A8E17, #178E2B
Tetradic#8E2B17, #3F8E17, #177B8E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C986EB
Lighter +30%#B65AE4
Lighter +20%#A22EDD
Lighter +10%#861EBA
Darker −10%#461062
Darker −20%#270936
Darker −30%#07020A
Darker −40%#000000
More saturated +25%#6D02A3
Less saturated −25%#5F2C79

Channel breakdown

R102
G23
B142
Red102 (40%)
Green23 (9%)
Blue142 (55.7%)
Hue279.83°
Saturation (HSL)72.12%
Lightness32.35%
Dominant channelBlue
Hex per channelR 66 · G 17 · B 8E

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Every value on this page was computed from “66178e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.