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Recognised as Colour

#66437F

  • #66437F
  • Violet
  • Dark
  • Nearest: Dark slateblue

#66437F is a violet with RGB values 102, 67, 127 and HSL 275°, 31%, 38%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#66437F#66437F
HEX#66437F
RGBrgb(102, 67, 127)
RGB (0–1)0.4, 0.2627, 0.498
RGB percentages40%, 26.3%, 49.8%
HSLhsl(275, 30.9%, 38%)
HSV / HSBhsv(275, 47.2%, 49.8%)
CMYK19.7%, 47.2%, 0%, 50.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,701,951
CSS custom property--colour: #66437F;

Brightness & contrast

Relative luminance0.08371WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.85:1
Contrast with white7.85:1WCAG normal text: AAA
Contrast with black2.67:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#99BC80

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#355081no red cones; affects about 1% of men; ΔE 21.7 from the original
Deuteranopia#3E527Dno green cones; the most common form, about 1% of men; ΔE 22.1 from the original
Tritanopia#634C5Bno blue cones; rare, and affects men and women equally; ΔE 27.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.85:1WCAG large text: AAA
Contrast with black, large text2.67:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.4Rebecca purple · ΔE 24.6Midnight blue · ΔE 28.8Medium purple · ΔE 31.3Slate blue · ΔE 32.6Purple · ΔE 33.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.44, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5C7F43
Analogous#48437F, #7F437A
Triadic#7F6643, #437F66
Split complementary#7A7F43, #437F48
Tetradic#7F4843, #5C7F43, #437A7F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAB6D8
Lighter +30%#B294C7
Lighter +20%#9A73B5
Lighter +10%#8155A0
Darker −10%#4B315E
Darker −20%#30203C
Darker −30%#160E1B
Darker −40%#000000
More saturated +25%#6A2B97
Less saturated −25%#625B67

Channel breakdown

R102
G67
B127
Red102 (40%)
Green67 (26.3%)
Blue127 (49.8%)
Hue275°
Saturation (HSL)30.93%
Lightness38.04%
Dominant channelBlue
Hex per channelR 66 · G 43 · B 7F

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Every value on this page was computed from “66437f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.