Recognised as Colour

#AC2F2B

#AC2F2B
Red
Dark
Nearest: Brown

#AC2F2B is a red with RGB values 172, 47, 43 and HSL 2°, 60%, 42%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#AC2F2B#AC2F2B

HEX#AC2F2B

RGBrgb(172, 47, 43)

RGB (0–1)0.6745, 0.1843, 0.1686

RGB percentages67.5%, 18.4%, 16.9%

HSLhsl(1.9, 60%, 42.2%)

HSV / HSBhsv(1.9, 75%, 67.5%)

CMYK0%, 72.7%, 75%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,284,267

CSS custom property--colour: #AC2F2B;

Brightness & contrast

Relative luminance0.10978WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.57:1

Contrast with white6.57:1WCAG normal text: AA

Contrast with black3.2:1WCAG normal text: Fail

Greyscale equivalent#494949

Inverted#53D0D4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#544C29no red cones; affects about 1% of men; ΔE 53.9 from the original

Deuteranopia#736726no green cones; the most common form, about 1% of men; ΔE 54.2 from the original

Tritanopia#BD002Fno blue cones; rare, and affects men and women equally; ΔE 14.8 from the original

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

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

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

Named colours

Brown · ΔE 2.9 Firebrick · ΔE 7.7 Dark red · ΔE 14.4 Maroon · ΔE 15.2 Indian red · ΔE 18.2 Sienna · ΔE 21.5

Nearest named CSS colourBrown (#A52A2A)ΔE 2.92, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BA8AC

Analogous#AC2B68, #AC6F2B

Triadic#2BAC2F, #2F2BAC

Split complementary#2BAC70, #2B67AC

Tetradic#67AC2B, #2BA8AC, #702BAC

Tints, shades & saturation

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

Lighter +40%#EDB8B6

Lighter +30%#E3908D

Lighter +20%#D86865

Lighter +10%#CE403C

Darker −10%#832421

Darker −20%#5A1917

Darker −30%#320E0C

Darker −40%#090202

More saturated +25%#C71610

Less saturated −25%#914846

Channel breakdown

R172

G47

B43

Red172 (67.5%)

Green47 (18.4%)

Blue43 (16.9%)

Hue1.86°

Saturation (HSL)60%

Lightness42.16%

Dominant channelRed

Hex per channelR AC · G 2F · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac2F2B (chemical formula)

Formula
502.806 g/mol
5 atoms

Ac2F2B has a molar mass of 502.806 g/mol, made up of 5 atoms across 3 elements: 2 × Ac, 2 × F, 1 × B.

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Molar mass

Molar mass502.806 g/mol

Total atoms per molecule5

Distinct elements3

Mass of one molecule8.3492901 × 10^-22 g

Molecules per gram1.1977066 × 10^21

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

Ac90.3%

F7.6%

B2.1%

Actinium (Ac × 2)454 g/mol, 90.293%

Fluorine (F × 2)37.996 g/mol, 7.557%

Boron (B)10.81 g/mol, 2.15%

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Elements in this formula

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