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Recognised as Colour

#66406E

  • #66406E
  • Violet
  • Dark
  • Nearest: Dark slateblue

#66406E is a violet with RGB values 102, 64, 110 and HSL 290°, 26%, 34%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#66406E#66406E
HEX#66406E
RGBrgb(102, 64, 110)
RGB (0–1)0.4, 0.251, 0.4314
RGB percentages40%, 25.1%, 43.1%
HSLhsl(289.6, 26.4%, 34.1%)
HSV / HSBhsv(289.6, 41.8%, 43.1%)
CMYK7.3%, 41.8%, 0%, 56.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,701,166
CSS custom property--colour: #66406E;

Brightness & contrast

Relative luminance0.07617WCAG 2.x, 0 is black and 1 is white
Perceived brightness83 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.32:1
Contrast with white8.32:1WCAG normal text: AAA
Contrast with black2.52:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#99BF91

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A4B70no red cones; affects about 1% of men; ΔE 21 from the original
Deuteranopia#444F6Dno green cones; the most common form, about 1% of men; ΔE 21.3 from the original
Tritanopia#674552no blue cones; rare, and affects men and women equally; ΔE 20 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.32:1WCAG large text: AAA
Contrast with black, large text2.52:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.2Rebecca purple · ΔE 32.4Dim grey · ΔE 34Midnight blue · ΔE 34.9Slate grey · ΔE 34.9Light slate grey · ΔE 36.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.17, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#486E40
Analogous#4F406E, #6E405F
Triadic#6E6640, #406E66
Split complementary#5F6E40, #406E4F
Tetradic#6E4F40, #486E40, #405F6E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8ACCE
Lighter +30%#B38BBC
Lighter +20%#9E6BA9
Lighter +10%#84538E
Darker −10%#482D4E
Darker −20%#2A1A2E
Darker −30%#0C080D
Darker −40%#000000
More saturated +25%#742A84
Less saturated −25%#585658

Channel breakdown

R102
G64
B110
Red102 (40%)
Green64 (25.1%)
Blue110 (43.1%)
Hue289.57°
Saturation (HSL)26.44%
Lightness34.12%
Dominant channelBlue
Hex per channelR 66 · G 40 · B 6E

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Every value on this page was computed from “66406e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.