Recognised as Colour

#AC5571

#AC5571
Red
Dark
Nearest: Pale violetred

#AC5571 is a red with RGB values 172, 85, 113 and HSL 341°, 34%, 50%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Pale violetred.

Colour values

#AC5571#AC5571

HEX#AC5571

RGBrgb(172, 85, 113)

RGB (0–1)0.6745, 0.3333, 0.4431

RGB percentages67.5%, 33.3%, 44.3%

HSLhsl(340.7, 34.4%, 50.4%)

HSV / HSBhsv(340.7, 50.6%, 67.5%)

CMYK0%, 50.6%, 34.3%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,294,065

CSS custom property--colour: #AC5571;

Brightness & contrast

Relative luminance0.1646WCAG 2.x, 0 is black and 1 is white

Perceived brightness120.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.89:1

Contrast with white4.89:1WCAG normal text: AA

Contrast with black4.29:1WCAG normal text: Fail

Greyscale equivalent#6A6A6A

Inverted#53AA8E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#636772no red cones; affects about 1% of men; ΔE 38.7 from the original

Deuteranopia#79776Fno green cones; the most common form, about 1% of men; ΔE 39.7 from the original

Tritanopia#B84E5Fno blue cones; rare, and affects men and women equally; ΔE 12.6 from the original

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

Contrast with white, large text4.89:1WCAG large text: AAA

Contrast with black, large text4.29:1WCAG large text: AA

Named colours

Pale violetred · ΔE 14.7 Indian red · ΔE 23 Light coral · ΔE 26.8 Rosy brown · ΔE 27.6 Hot pink · ΔE 33.2 Brown · ΔE 33.4

Nearest named CSS colourPale violetred (#DB7093)ΔE 14.7, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#55AC90

Analogous#AC559D, #AC6455

Triadic#71AC55, #5571AC

Split complementary#55AC64, #559DAC

Tetradic#9DAC55, #55AC90, #6455AC

Tints, shades & saturation

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

Lighter +40%#EFDEE3

Lighter +30%#DEBCC7

Lighter +20%#CD9AAA

Lighter +10%#BD778E

Darker −10%#8A445A

Darker −20%#683344

Darker −30%#46222E

Darker −40%#241117

More saturated +25%#CC3566

Less saturated −25%#8C757C

Channel breakdown

R172

G85

B113

Red172 (67.5%)

Green85 (33.3%)

Blue113 (44.3%)

Hue340.69°

Saturation (HSL)34.39%

Lightness50.39%

Dominant channelRed

Hex per channelR AC · G 55 · B 71

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac5571 (chemical formula)

Formula
1,264,617 g/mol
5571 atoms

Ac5571 has a molar mass of 1,264,617 g/mol, made up of 5571 atoms across 1 element: 5571 × Ac.

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Molar mass

Molar mass1,264,617 g/mol

Total atoms per molecule5571

Distinct elements1

Mass of one molecule2.0999459 × 10^-18 g

Molecules per gram4.7620274 × 10^17

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

Ac100%

Actinium (Ac × 5571)1,264,617 g/mol, 100%

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Elements in this formula

Actinium

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