Recognised as Colour

#AC1733

#AC1733
Red
Dark
Nearest: Brown

#AC1733 is a red with RGB values 172, 23, 51 and HSL 349°, 76%, 38%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Brown.

Colour values

#AC1733#AC1733

HEX#AC1733

RGBrgb(172, 23, 51)

RGB (0–1)0.6745, 0.0902, 0.2

RGB percentages67.5%, 9%, 20%

HSLhsl(348.7, 76.4%, 38.2%)

HSV / HSBhsv(348.7, 86.6%, 67.5%)

CMYK0%, 86.6%, 70.3%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,278,131

CSS custom property--colour: #AC1733;

Brightness & contrast

Relative luminance0.09622WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.18:1

Contrast with white7.18:1WCAG normal text: AAA

Contrast with black2.92:1WCAG normal text: Fail

Greyscale equivalent#393939

Inverted#53E8CC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#484433no red cones; affects about 1% of men; ΔE 61.3 from the original

Deuteranopia#6C622Eno green cones; the most common form, about 1% of men; ΔE 61.4 from the original

Tritanopia#BD0024no blue cones; rare, and affects men and women equally; ΔE 14.7 from the original

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

Contrast with white, large text7.18:1WCAG large text: AAA

Contrast with black, large text2.92:1WCAG large text: Fail

Named colours

Brown · ΔE 9.7 Firebrick · ΔE 13 Crimson · ΔE 18.7 Dark red · ΔE 19.8 Maroon · ΔE 20 Indian red · ΔE 20.8

Nearest named CSS colourBrown (#A52A2A)ΔE 9.68, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17AC90

Analogous#AC177E, #AC4617

Triadic#33AC17, #1733AC

Split complementary#17AC46, #177EAC

Tetradic#7EAC17, #17AC90, #4517AC

Tints, shades & saturation

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

Lighter +40%#F29DAD

Lighter +30%#EC7087

Lighter +20%#E64362

Lighter +10%#D91D40

Darker −10%#7F1126

Darker −20%#520B18

Darker −30%#25050B

Darker −40%#000000

More saturated +25%#C30025

Less saturated −25%#942F42

Channel breakdown

R172

G23

B51

Red172 (67.5%)

Green23 (9%)

Blue51 (20%)

Hue348.72°

Saturation (HSL)76.41%

Lightness38.24%

Dominant channelRed

Hex per channelR AC · G 17 · B 33

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac1733 (chemical formula)

Formula
393,391 g/mol
1733 atoms

Ac1733 has a molar mass of 393,391 g/mol, made up of 1733 atoms across 1 element: 1733 × Ac.

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Molar mass

Molar mass393,391 g/mol

Total atoms per molecule1733

Distinct elements1

Mass of one molecule6.5324112 × 10^-19 g

Molecules per gram1.5308283 × 10^18

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 × 1733)393,391 g/mol, 100%

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Elements in this formula

Actinium

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