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Recognised as Colour

#551B84

  • #551B84
  • Violet
  • Dark
  • Nearest: Rebecca purple

#551B84 is a violet with RGB values 85, 27, 132 and HSL 273°, 66%, 31%. It is a dark colour, so white text on it reaches 11.2:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.

Colour values

#551B84#551B84
HEX#551B84
RGBrgb(85, 27, 132)
RGB (0–1)0.3333, 0.1059, 0.5176
RGB percentages33.3%, 10.6%, 51.8%
HSLhsl(273.1, 66%, 31.2%)
HSV / HSBhsv(273.1, 79.5%, 51.8%)
CMYK35.6%, 79.5%, 0%, 48.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,577,604
CSS custom property--colour: #551B84;

Brightness & contrast

Relative luminance0.04381WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.19:1
Contrast with white11.19:1WCAG normal text: AAA
Contrast with black1.88:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#AAE47B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003A87no red cones; affects about 1% of men; ΔE 29.2 from the original
Deuteranopia#003B82no green cones; the most common form, about 1% of men; ΔE 32.2 from the original
Tritanopia#4C364Fno blue cones; rare, and affects men and women equally; ΔE 47.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.19:1WCAG large text: AAA
Contrast with black, large text1.88:1WCAG large text: Fail

Named colours

Rebecca purple · ΔE 8.5Indigo · ΔE 9.7Midnight blue · ΔE 16.7Purple · ΔE 17.8Dark magenta · ΔE 20.5Dark slateblue · ΔE 21.1
Nearest named CSS colourRebecca purple (#663399)ΔE 8.45, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4A841B
Analogous#201B84, #841B7F
Triadic#84551B, #1B8455
Split complementary#7F841B, #1B8420
Tetradic#84201B, #4A841B, #1B7F84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BB85E6
Lighter +30%#A35BDD
Lighter +20%#8B30D5
Lighter +10%#7024AE
Darker −10%#3A125A
Darker −20%#1E0A2F
Darker −30%#030105
Darker −40%#000000
More saturated +25%#570798
Less saturated −25%#532F70

Channel breakdown

R85
G27
B132
Red85 (33.3%)
Green27 (10.6%)
Blue132 (51.8%)
Hue273.14°
Saturation (HSL)66.04%
Lightness31.18%
Dominant channelBlue
Hex per channelR 55 · G 1B · B 84

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Every value on this page was computed from “551b84” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.