Recognised as Colour

#AC1F54

#AC1F54
Red
Dark
Nearest: Medium violet red

#AC1F54 is a red with RGB values 172, 31, 84 and HSL 337°, 69%, 40%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Medium violet red.

Colour values

#AC1F54#AC1F54

HEX#AC1F54

RGBrgb(172, 31, 84)

RGB (0–1)0.6745, 0.1216, 0.3294

RGB percentages67.5%, 12.2%, 32.9%

HSLhsl(337.4, 69.5%, 39.8%)

HSV / HSBhsv(337.4, 82%, 67.5%)

CMYK0%, 82%, 51.2%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,280,212

CSS custom property--colour: #AC1F54;

Brightness & contrast

Relative luminance0.10391WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.82:1

Contrast with white6.82:1WCAG normal text: AA

Contrast with black3.08:1WCAG normal text: Fail

Greyscale equivalent#414141

Inverted#53E0AB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#454955no red cones; affects about 1% of men; ΔE 58.6 from the original

Deuteranopia#6A6551no green cones; the most common form, about 1% of men; ΔE 60 from the original

Tritanopia#BC0037no blue cones; rare, and affects men and women equally; ΔE 21.6 from the original

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

Contrast with white, large text6.82:1WCAG large text: AAA

Contrast with black, large text3.08:1WCAG large text: AA

Named colours

Medium violet red · ΔE 25.4 Indian red · ΔE 25.7 Pale violetred · ΔE 25.8 Brown · ΔE 26.2 Crimson · ΔE 32 Firebrick · ΔE 32

Nearest named CSS colourMedium violet red (#C71585)ΔE 25.45, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FAC77

Analogous#AC1F9B, #AC301F

Triadic#54AC1F, #1F54AC

Split complementary#1FAC30, #1F9BAC

Tetradic#9BAC1F, #1FAC77, #301FAC

Tints, shades & saturation

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

Lighter +40%#EFA8C3

Lighter +30%#E77DA5

Lighter +20%#E05187

Lighter +10%#D72769

Darker −10%#81173F

Darker −20%#560F2A

Darker −30%#2A0815

Darker −40%#000000

More saturated +25%#C5064E

Less saturated −25%#93385A

Channel breakdown

R172

G31

B84

Red172 (67.5%)

Green31 (12.2%)

Blue84 (32.9%)

Hue337.45°

Saturation (HSL)69.46%

Lightness39.8%

Dominant channelRed

Hex per channelR AC · G 1F · B 54

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac1F54 (chemical formula)

Formula
1,252.892 g/mol
55 atoms

Ac1F54 has a molar mass of 1,252.892 g/mol, made up of 55 atoms across 2 elements: 1 × Ac, 54 × F.

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Molar mass

Molar mass1,252.892 g/mol

Total atoms per molecule55

Distinct elements2

Mass of one molecule2.0804761 × 10^-21 g

Molecules per gram4.8065921 × 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

Ac18.1%

F81.9%

Actinium (Ac)227 g/mol, 18.118%

Fluorine (F × 54)1,025.892 g/mol, 81.882%

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