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Recognised as Colour

#663F64

  • #663F64
  • Magenta
  • Dark
  • Nearest: Dark slateblue

#663F64 is a magenta with RGB values 102, 63, 100 and HSL 303°, 24%, 32%. It is a dark colour, so white text on it reaches 8.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#663F64#663F64
HEX#663F64
RGBrgb(102, 63, 100)
RGB (0–1)0.4, 0.2471, 0.3922
RGB percentages40%, 24.7%, 39.2%
HSLhsl(303.1, 23.6%, 32.4%)
HSV / HSBhsv(303.1, 38.2%, 40%)
CMYK0%, 38.2%, 2%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,700,900
CSS custom property--colour: #663F64;

Brightness & contrast

Relative luminance0.073WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.54:1
Contrast with white8.54:1WCAG normal text: AAA
Contrast with black2.46:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#99C09B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D4965no red cones; affects about 1% of men; ΔE 20.8 from the original
Deuteranopia#474E63no green cones; the most common form, about 1% of men; ΔE 21.1 from the original
Tritanopia#69424Dno blue cones; rare, and affects men and women equally; ΔE 16 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.54:1WCAG large text: AAA
Contrast with black, large text2.46:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27.5Dim grey · ΔE 30.3Slate grey · ΔE 33Gray · ΔE 34.9Light slate grey · ΔE 35Dark slate grey · ΔE 37
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27.46, a distinctly different colour
Hue familymagenta
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F6641
Analogous#553F66, #663F50
Triadic#64663F, #3F6466
Split complementary#50663F, #3F6655
Tetradic#66553F, #3F6641, #3F5066

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9A8C7
Lighter +30%#B688B3
Lighter +20%#A2699F
Lighter +10%#865283
Darker −10%#462C45
Darker −20%#271826
Darker −30%#070507
Darker −40%#000000
More saturated +25%#7B2A77
Less saturated −25%#525252

Channel breakdown

R102
G63
B100
Red102 (40%)
Green63 (24.7%)
Blue100 (39.2%)
Hue303.08°
Saturation (HSL)23.64%
Lightness32.35%
Dominant channelRed
Hex per channelR 66 · G 3F · B 64

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Every value on this page was computed from “663f64” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.