Recognised as Colour

#AC1725

#AC1725
Red
Dark
Nearest: Firebrick

#AC1725 is a red with RGB values 172, 23, 37 and HSL 354°, 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 Firebrick.

Colour values

#AC1725#AC1725

HEX#AC1725

RGBrgb(172, 23, 37)

RGB (0–1)0.6745, 0.0902, 0.1451

RGB percentages67.5%, 9%, 14.5%

HSLhsl(354.4, 76.4%, 38.2%)

HSV / HSBhsv(354.4, 86.6%, 67.5%)

CMYK0%, 86.6%, 78.5%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,278,117

CSS custom property--colour: #AC1725;

Brightness & contrast

Relative luminance0.09517WCAG 2.x, 0 is black and 1 is white

Perceived brightness96.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.23:1

Contrast with white7.23:1WCAG normal text: AAA

Contrast with black2.9:1WCAG normal text: Fail

Greyscale equivalent#383838

Inverted#53E8DA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4A4324no red cones; affects about 1% of men; ΔE 61.2 from the original

Deuteranopia#6E621Fno green cones; the most common form, about 1% of men; ΔE 61 from the original

Tritanopia#BE001Fno blue cones; rare, and affects men and women equally; ΔE 11 from the original

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

Contrast with white, large text7.23:1WCAG large text: AAA

Contrast with black, large text2.9:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5 Brown · ΔE 7.8 Dark red · ΔE 13.4 Maroon · ΔE 15.3 Crimson · ΔE 17.2 Indian red · ΔE 23.3

Nearest named CSS colourFirebrick (#B22222)ΔE 4.96, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17AC9E

Analogous#AC176F, #AC5417

Triadic#25AC17, #1725AC

Split complementary#17AC54, #176FAC

Tetradic#70AC17, #17AC9E, #5417AC

Tints, shades & saturation

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

Lighter +40%#F29DA5

Lighter +30%#EC707C

Lighter +20%#E64352

Lighter +10%#D91D2F

Darker −10%#7F111B

Darker −20%#520B12

Darker −30%#250508

Darker −40%#000000

More saturated +25%#C30012

Less saturated −25%#942F39

Channel breakdown

R172

G23

B37

Red172 (67.5%)

Green23 (9%)

Blue37 (14.5%)

Hue354.36°

Saturation (HSL)76.41%

Lightness38.24%

Dominant channelRed

Hex per channelR AC · G 17 · B 25

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac1725 (chemical formula)

Formula
391,575 g/mol
1725 atoms

Ac1725 has a molar mass of 391,575 g/mol, made up of 1725 atoms across 1 element: 1725 × Ac.

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Molar mass

Molar mass391,575 g/mol

Total atoms per molecule1725

Distinct elements1

Mass of one molecule6.5022559 × 10^-19 g

Molecules per gram1.5379278 × 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 × 1725)391,575 g/mol, 100%

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Elements in this formula

Actinium

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