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Recognised as Colour

#663FD3

  • #663FD3
  • Violet
  • Dark
  • Nearest: Dark orchid

#663FD3 is a violet with RGB values 102, 63, 211 and HSL 256°, 63%, 54%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dark orchid.

Colour values

#663FD3#663FD3
HEX#663FD3
RGBrgb(102, 63, 211)
RGB (0–1)0.4, 0.2471, 0.8275
RGB percentages40%, 24.7%, 82.7%
HSLhsl(255.8, 62.7%, 53.7%)
HSV / HSBhsv(255.8, 70.1%, 82.7%)
CMYK51.7%, 70.1%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,701,011
CSS custom property--colour: #663FD3;

Brightness & contrast

Relative luminance0.11083WCAG 2.x, 0 is black and 1 is white
Perceived brightness102.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.53:1
Contrast with white6.53:1WCAG normal text: AA
Contrast with black3.22:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#99C02C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0061D7no red cones; affects about 1% of men; ΔE 29.8 from the original
Deuteranopia#005AD0no green cones; the most common form, about 1% of men; ΔE 27.8 from the original
Tritanopia#3D6685no blue cones; rare, and affects men and women equally; ΔE 75.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.53:1WCAG large text: AAA
Contrast with black, large text3.22:1WCAG large text: AA

Named colours

Dark orchid · ΔE 16.9Medium slateblue · ΔE 17.4Blue violet · ΔE 18.3Slate blue · ΔE 21.3Dark violet · ΔE 24.1Dark blue · ΔE 25.1
Nearest named CSS colourDark orchid (#9932CC)ΔE 16.9, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ACD33F
Analogous#3F62D3, #B03FD3
Triadic#D3663F, #3FD366
Split complementary#D3B03F, #62D33F
Tetradic#D33F62, #ACD33F, #3FD3B0

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EAE5F9
Lighter +30%#C9BBF0
Lighter +20%#A892E6
Lighter +10%#8768DD
Darker −10%#4E2AB5
Darker −20%#3C208C
Darker −30%#2B1762
Darker −40%#190D39
More saturated +25%#5822F1
Less saturated −25%#745DB5

Channel breakdown

R102
G63
B211
Red102 (40%)
Green63 (24.7%)
Blue211 (82.7%)
Hue255.81°
Saturation (HSL)62.71%
Lightness53.73%
Dominant channelBlue
Hex per channelR 66 · G 3F · B D3

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Every value on this page was computed from “663fd3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.