Recognised as Colour

#AC81B6

#AC81B6
Violet
Dark
Nearest: Plum

#AC81B6 is a violet with RGB values 172, 129, 182 and HSL 289°, 27%, 61%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Plum.

Colour values

#AC81B6#AC81B6

HEX#AC81B6

RGBrgb(172, 129, 182)

RGB (0–1)0.6745, 0.5059, 0.7137

RGB percentages67.5%, 50.6%, 71.4%

HSLhsl(288.7, 26.6%, 61%)

HSV / HSBhsv(288.7, 29.1%, 71.4%)

CMYK5.5%, 29.1%, 0%, 28.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,305,398

CSS custom property--colour: #AC81B6;

Brightness & contrast

Relative luminance0.27849WCAG 2.x, 0 is black and 1 is white

Perceived brightness149.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.57:1

Contrast with white3.2:1WCAG normal text: Fail

Contrast with black6.57:1WCAG normal text: AA

Greyscale equivalent#8E8E8E

Inverted#537E49

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7B8DB8no red cones; affects about 1% of men; ΔE 22.3 from the original

Deuteranopia#8592B4no green cones; the most common form, about 1% of men; ΔE 23 from the original

Tritanopia#AD8794no blue cones; rare, and affects men and women equally; ΔE 22.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.2:1WCAG large text: AA

Contrast with black, large text6.57:1WCAG large text: AAA

Named colours

Plum · ΔE 15.1 Thistle · ΔE 26.9 Pale violetred · ΔE 29.3 Rosy brown · ΔE 29.7 Light slate grey · ΔE 30.3 Slate grey · ΔE 30.9

Nearest named CSS colourPlum (#DDA0DD)ΔE 15.12, a distinctly different colour

Hue familyviolet

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#8BB681

Analogous#9281B6, #B681A5

Triadic#B6AC81, #81B6AC

Split complementary#A6B681, #81B692

Tetradic#B69281, #8BB681, #81A6B6

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FFFFFF

Lighter +30%#ECE2EE

Lighter +20%#D7C2DB

Lighter +10%#C1A1C9

Darker −10%#9761A3

Darker −20%#7A4D84

Darker −30%#5C3A64

Darker −40%#3E2744

More saturated +25%#BB68CF

Less saturated −25%#9D9A9D

Channel breakdown

R172

G129

B182

Red172 (67.5%)

Green129 (50.6%)

Blue182 (71.4%)

Hue288.68°

Saturation (HSL)26.63%

Lightness60.98%

Dominant channelBlue

Hex per channelR AC · G 81 · B B6

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac81B6 (chemical formula)

Formula
18,451.86 g/mol
87 atoms

Ac81B6 has a molar mass of 18,451.86 g/mol, made up of 87 atoms across 2 elements: 81 × Ac, 6 × B.

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Molar mass

Molar mass18,451.86 g/mol

Total atoms per molecule87

Distinct elements2

Mass of one molecule3.0640034 × 10^-20 g

Molecules per gram3.2637039 × 10^19

Name

NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show

Composition by mass

Ac99.6%

B0.4%

Actinium (Ac × 81)18,387 g/mol, 99.648%

Boron (B × 6)64.86 g/mol, 0.352%

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