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Recognised as Colour

#6633BB

  • #6633BB
  • Violet
  • Dark
  • Nearest: Dark orchid

#6633BB is a violet with RGB values 102, 51, 187 and HSL 263°, 57%, 47%. It is a dark colour, so white text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dark orchid.

Colour values

#6633BB#6633BB
HEX#6633BB
HEX (short)#63B
RGBrgb(102, 51, 187)
RGB (0–1)0.4, 0.2, 0.7333
RGB percentages40%, 20%, 73.3%
HSLhsl(262.5, 57.1%, 46.7%)
HSV / HSBhsv(262.5, 72.7%, 73.3%)
CMYK45.5%, 72.7%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,697,915
CSS custom property--colour: #6633BB;

Brightness & contrast

Relative luminance0.0878WCAG 2.x, 0 is black and 1 is white
Perceived brightness92.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.62:1
Contrast with white7.62:1WCAG normal text: AAA
Contrast with black2.76:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#99CC44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0055BFno red cones; affects about 1% of men; ΔE 30.7 from the original
Deuteranopia#0051B8no green cones; the most common form, about 1% of men; ΔE 30.8 from the original
Tritanopia#4E5674no blue cones; rare, and affects men and women equally; ΔE 65.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.62:1WCAG large text: AAA
Contrast with black, large text2.76:1WCAG large text: Fail

Named colours

Dark orchid · ΔE 15.9Indigo · ΔE 18Rebecca purple · ΔE 18.5Slate blue · ΔE 19.2Medium slateblue · ΔE 19.8Dark blue · ΔE 21.6
Nearest named CSS colourDark orchid (#9932CC)ΔE 15.86, a distinctly different colour
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#88BB33
Analogous#3344BB, #AA33BB
Triadic#BB6633, #33BB66
Split complementary#BBAA33, #44BB33
Tetradic#BB3344, #88BB33, #33BBAA

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D8CAF0
Lighter +30%#BBA2E5
Lighter +20%#9E79DB
Lighter +10%#8151D0
Darker −10%#502893
Darker −20%#3A1D6B
Darker −30%#241243
Darker −40%#0F071B
More saturated +25%#5F15D9
Less saturated −25%#6D519D

Channel breakdown

R102
G51
B187
Red102 (40%)
Green51 (20%)
Blue187 (73.3%)
Hue262.5°
Saturation (HSL)57.14%
Lightness46.67%
Dominant channelBlue
Hex per channelR 66 · G 33 · B BB

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Every value on this page was computed from “6633bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.