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Recognised as Colour

#663ABF

  • #663ABF
  • Violet
  • Dark
  • Nearest: Slate blue

#663ABF is a violet with RGB values 102, 58, 191 and HSL 260°, 53%, 49%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#663ABF#663ABF
HEX#663ABF
RGBrgb(102, 58, 191)
RGB (0–1)0.4, 0.2275, 0.749
RGB percentages40%, 22.7%, 74.9%
HSLhsl(259.8, 53.4%, 48.8%)
HSV / HSBhsv(259.8, 69.6%, 74.9%)
CMYK46.6%, 69.6%, 0%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,699,711
CSS custom property--colour: #663ABF;

Brightness & contrast

Relative luminance0.09612WCAG 2.x, 0 is black and 1 is white
Perceived brightness96.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.19:1
Contrast with white7.19:1WCAG normal text: AAA
Contrast with black2.92:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#99C540

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0059C3no red cones; affects about 1% of men; ΔE 29.3 from the original
Deuteranopia#0055BCno green cones; the most common form, about 1% of men; ΔE 29.5 from the original
Tritanopia#4B5C78no blue cones; rare, and affects men and women equally; ΔE 66 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.19:1WCAG large text: AAA
Contrast with black, large text2.92:1WCAG large text: Fail

Named colours

Slate blue · ΔE 16.4Dark orchid · ΔE 17.3Medium slateblue · ΔE 17.3Rebecca purple · ΔE 17.6Indigo · ΔE 19.4Dark blue · ΔE 23.1
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 16.42, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#93BF3A
Analogous#3A51BF, #A83ABF
Triadic#BF663A, #3ABF66
Split complementary#BFA83A, #51BF3A
Tetradic#BF3A51, #93BF3A, #3ABFA8

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDD3F2
Lighter +30%#BFACE6
Lighter +20%#A185DA
Lighter +10%#835ECE
Darker −10%#512E98
Darker −20%#3C2271
Darker −30%#27164A
Darker −40%#120A23
More saturated +25%#5B1BDE
Less saturated −25%#7159A0

Channel breakdown

R102
G58
B191
Red102 (40%)
Green58 (22.7%)
Blue191 (74.9%)
Hue259.85°
Saturation (HSL)53.41%
Lightness48.82%
Dominant channelBlue
Hex per channelR 66 · G 3A · B BF

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