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Recognised as Colour

#643DC7

  • #643DC7
  • Violet
  • Dark
  • Nearest: Medium slateblue

#643DC7 is a violet with RGB values 100, 61, 199 and HSL 257°, 55%, 51%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#643DC7#643DC7
HEX#643DC7
RGBrgb(100, 61, 199)
RGB (0–1)0.3922, 0.2392, 0.7804
RGB percentages39.2%, 23.9%, 78%
HSLhsl(257, 55.2%, 51%)
HSV / HSBhsv(257, 69.3%, 78%)
CMYK49.7%, 69.3%, 0%, 22%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,569,415
CSS custom property--colour: #643DC7;

Brightness & contrast

Relative luminance0.1017WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.92:1
Contrast with white6.92:1WCAG normal text: AA
Contrast with black3.03:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#9BC238

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005CCBno red cones; affects about 1% of men; ΔE 28.4 from the original
Deuteranopia#0056C4no green cones; the most common form, about 1% of men; ΔE 27.2 from the original
Tritanopia#42607Dno blue cones; rare, and affects men and women equally; ΔE 69.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.92:1WCAG large text: AAA
Contrast with black, large text3.03:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 16.4Slate blue · ΔE 17.4Dark orchid · ΔE 17.4Rebecca purple · ΔE 20.7Indigo · ΔE 21.9Blue violet · ΔE 22.4
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 16.41, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A0C73D
Analogous#3D5BC7, #A93DC7
Triadic#C7643D, #3DC764
Split complementary#C7A93D, #5BC73D
Tetradic#C73D5B, #A0C73D, #3DC7A9

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E2DBF5
Lighter +30%#C3B4E9
Lighter +20%#A38CDE
Lighter +10%#8465D2
Darker −10%#4F2FA2
Darker −20%#3C237B
Darker −30%#291853
Darker −40%#150D2B
More saturated +25%#561EE6
Less saturated −25%#725CA8

Channel breakdown

R100
G61
B199
Red100 (39.2%)
Green61 (23.9%)
Blue199 (78%)
Hue256.96°
Saturation (HSL)55.2%
Lightness50.98%
Dominant channelBlue
Hex per channelR 64 · G 3D · B C7

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Every value on this page was computed from “643dc7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.