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Recognised as Colour

#A90051

  • #A90051
  • Red
  • Dark
  • Nearest: Medium violet red

#A90051 is a red with RGB values 169, 0, 81 and HSL 331°, 100%, 33%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Medium violet red.

Colour values

#A90051#A90051
HEX#A90051
RGBrgb(169, 0, 81)
RGB (0–1)0.6627, 0, 0.3176
RGB percentages66.3%, 0%, 31.8%
HSLhsl(331.2, 100%, 33.1%)
HSV / HSBhsv(331.2, 100%, 66.3%)
CMYK0%, 100%, 52.1%, 33.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,075,665
CSS custom property--colour: #A90051;

Brightness & contrast

Relative luminance0.09029WCAG 2.x, 0 is black and 1 is white
Perceived brightness96.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.48:1
Contrast with white7.48:1WCAG normal text: AAA
Contrast with black2.81:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#56FFAE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3B4152no red cones; affects about 1% of men; ΔE 62.4 from the original
Deuteranopia#645F4Dno green cones; the most common form, about 1% of men; ΔE 63.8 from the original
Tritanopia#B9002Eno blue cones; rare, and affects men and women equally; ΔE 26.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.48:1WCAG large text: AAA
Contrast with black, large text2.81:1WCAG large text: Fail

Named colours

Medium violet red · ΔE 22.9Brown · ΔE 29.3Pale violetred · ΔE 29.8Indian red · ΔE 30.4Deep pink · ΔE 31.6Crimson · ΔE 32.8
Nearest named CSS colourMedium violet red (#C71585)ΔE 22.87, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#00A958
Analogous#A900A6, #A90400
Triadic#51A900, #0051A9
Split complementary#00A904, #00A6A9
Tetradic#A5A900, #00A958, #0300A9

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FF76B8
Lighter +30%#FF439D
Lighter +20%#FF1083
Lighter +10%#DC0069
Darker −10%#760039
Darker −20%#430020
Darker −30%#100008
Darker −40%#000000
More saturated +25%#A90051
Less saturated −25%#941552

Channel breakdown

R169
G0
B81
Red169 (66.3%)
Green0 (0%)
Blue81 (31.8%)
Hue331.24°
Saturation (HSL)100%
Lightness33.14%
Dominant channelRed
Hex per channelR A9 · G 00 · B 51

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Every value on this page was computed from “a90051” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.