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Recognised as Colour

#663A64

  • #663A64
  • Magenta
  • Dark
  • Nearest: Dark slateblue

#663A64 is a magenta with RGB values 102, 58, 100 and HSL 303°, 28%, 31%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#663A64#663A64
HEX#663A64
RGBrgb(102, 58, 100)
RGB (0–1)0.4, 0.2275, 0.3922
RGB percentages40%, 22.7%, 39.2%
HSLhsl(302.7, 27.5%, 31.4%)
HSV / HSBhsv(302.7, 43.1%, 40%)
CMYK0%, 43.1%, 2%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,699,620
CSS custom property--colour: #663A64;

Brightness & contrast

Relative luminance0.06771WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.92:1
Contrast with white8.92:1WCAG normal text: AAA
Contrast with black2.35:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#99C59B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#374666no red cones; affects about 1% of men; ΔE 23.4 from the original
Deuteranopia#434C63no green cones; the most common form, about 1% of men; ΔE 24.2 from the original
Tritanopia#693E4Ano blue cones; rare, and affects men and women equally; ΔE 18.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.92:1WCAG large text: AAA
Contrast with black, large text2.35:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.5Dim grey · ΔE 34Rebecca purple · ΔE 34.6Slate grey · ΔE 36.4Midnight blue · ΔE 36.7Purple · ΔE 38
Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.45, a distinctly different colour
Hue familymagenta
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A663C
Analogous#523A66, #663A4E
Triadic#64663A, #3A6466
Split complementary#4E663A, #3A6652
Tetradic#66523A, #3A663C, #3A4E66

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAA2C8
Lighter +30%#B881B5
Lighter +20%#A561A2
Lighter +10%#874C84
Darker −10%#452844
Darker −20%#251524
Darker −30%#040304
Darker −40%#000000
More saturated +25%#7A2676
Less saturated −25%#524E52

Channel breakdown

R102
G58
B100
Red102 (40%)
Green58 (22.7%)
Blue100 (39.2%)
Hue302.73°
Saturation (HSL)27.5%
Lightness31.37%
Dominant channelRed
Hex per channelR 66 · G 3A · B 64

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Every value on this page was computed from “663a64” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.