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Recognised as Colour

#A155CA

  • #A155CA
  • Violet
  • Dark
  • Nearest: Medium orchid

#A155CA is a violet with RGB values 161, 85, 202 and HSL 279°, 52%, 56%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Medium orchid.

Colour values

#A155CA#A155CA
HEX#A155CA
RGBrgb(161, 85, 202)
RGB (0–1)0.6314, 0.3333, 0.7922
RGB percentages63.1%, 33.3%, 79.2%
HSLhsl(279, 52.5%, 56.3%)
HSV / HSBhsv(279, 57.9%, 79.2%)
CMYK20.3%, 57.9%, 0%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,573,258
CSS custom property--colour: #A155CA;

Brightness & contrast

Relative luminance0.18338WCAG 2.x, 0 is black and 1 is white
Perceived brightness129 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.67:1
Contrast with white4.5:1WCAG normal text: Fail
Contrast with black4.67:1WCAG normal text: AA
Greyscale equivalent#6E6E6E
Inverted#5EAA35

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2F73CEno red cones; affects about 1% of men; ΔE 40.6 from the original
Deuteranopia#4D78C7no green cones; the most common form, about 1% of men; ΔE 41.4 from the original
Tritanopia#9D6A87no blue cones; rare, and affects men and women equally; ΔE 48.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.5:1WCAG large text: AA
Contrast with black, large text4.67:1WCAG large text: AAA

Named colours

Medium orchid · ΔE 8.9Medium purple · ΔE 15.2Slate blue · ΔE 18.2Rebecca purple · ΔE 18.9Dark orchid · ΔE 19.5Orchid · ΔE 19.5
Nearest named CSS colourMedium orchid (#BA55D3)ΔE 8.94, clearly different but related
Hue familyviolet
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7ECA55
Analogous#6755CA, #CA55B8
Triadic#CAA155, #55CAA1
Split complementary#B8CA55, #55CA67
Tetradic#CA6755, #7ECA55, #55B8CA

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F7F1FA
Lighter +30%#E1CAEE
Lighter +20%#CCA3E2
Lighter +10%#B67CD6
Darker −10%#8938B4
Darker −20%#6B2C8D
Darker −30%#4E2066
Darker −40%#30143F
More saturated +25%#A939E6
Less saturated −25%#9971AE

Channel breakdown

R161
G85
B202
Red161 (63.1%)
Green85 (33.3%)
Blue202 (79.2%)
Hue278.97°
Saturation (HSL)52.47%
Lightness56.27%
Dominant channelBlue
Hex per channelR A1 · G 55 · B CA

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Every value on this page was computed from “a155ca” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.