Recognised as Colour

#AC21CB

#AC21CB
Violet
Dark
Nearest: Dark orchid

#AC21CB is a violet with RGB values 172, 33, 203 and HSL 289°, 72%, 46%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Dark orchid.

Colour values

#AC21CB#AC21CB

HEX#AC21CB

RGBrgb(172, 33, 203)

RGB (0–1)0.6745, 0.1294, 0.7961

RGB percentages67.5%, 12.9%, 79.6%

HSLhsl(289.1, 72%, 46.3%)

HSV / HSBhsv(289.1, 83.7%, 79.6%)

CMYK15.3%, 83.7%, 0%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,280,843

CSS custom property--colour: #AC21CB;

Brightness & contrast

Relative luminance0.1417WCAG 2.x, 0 is black and 1 is white

Perceived brightness119.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.48:1

Contrast with white5.48:1WCAG normal text: AA

Contrast with black3.83:1WCAG normal text: Fail

Greyscale equivalent#4B4B4B

Inverted#53DE34

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0061CFno red cones; affects about 1% of men; ΔE 53.9 from the original

Deuteranopia#2F6DC8no green cones; the most common form, about 1% of men; ΔE 61.3 from the original

Tritanopia#AC4B7Ano blue cones; rare, and affects men and women equally; ΔE 57.9 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text5.48:1WCAG large text: AAA

Contrast with black, large text3.83:1WCAG large text: AA

Named colours

Dark orchid · ΔE 8.6 Dark violet · ΔE 14 Blue violet · ΔE 17.7 Medium orchid · ΔE 19.8 Dark magenta · ΔE 24.8 Purple · ΔE 29.5

Nearest named CSS colourDark orchid (#9932CC)ΔE 8.62, clearly different but related

Hue familyviolet

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#40CB21

Analogous#5721CB, #CB2195

Triadic#CBAC21, #21CBAC

Split complementary#95CB21, #21CB57

Tetradic#CB5721, #40CB21, #2195CB

Tints, shades & saturation

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

Lighter +40%#ECC3F5

Lighter +30%#DE97EE

Lighter +20%#D06BE7

Lighter +10%#C33FE0

Darker −10%#871A9F

Darker −20%#621373

Darker −30%#3C0C47

Darker −40%#17041C

More saturated +25%#BF04E8

Less saturated −25%#993EAE

Channel breakdown

R172

G33

B203

Red172 (67.5%)

Green33 (12.9%)

Blue203 (79.6%)

Hue289.06°

Saturation (HSL)72.03%

Lightness46.27%

Dominant channelBlue

Hex per channelR AC · G 21 · B CB

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac21CB (chemical formula)

Formula
4,789.821 g/mol
23 atoms

Ac21CB has a molar mass of 4,789.821 g/mol, made up of 23 atoms across 3 elements: 21 × Ac, 1 × C, 1 × B.

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Molar mass

Molar mass4,789.821 g/mol

Total atoms per molecule23

Distinct elements3

Mass of one molecule7.9536849 × 10^-21 g

Molecules per gram1.2572789 × 10^20

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

Ac99.5%

C0.3%

B0.2%

Actinium (Ac × 21)4,767 g/mol, 99.524%

Carbon (C)12.011 g/mol, 0.251%

Boron (B)10.81 g/mol, 0.226%

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Elements in this formula

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