Recognised as Colour

#AC2751

#AC2751
Red
Dark
Nearest: Indian red

#AC2751 is a red with RGB values 172, 39, 81 and HSL 341°, 63%, 41%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Indian red.

Colour values

#AC2751#AC2751

HEX#AC2751

RGBrgb(172, 39, 81)

RGB (0–1)0.6745, 0.1529, 0.3176

RGB percentages67.5%, 15.3%, 31.8%

HSLhsl(341.1, 63%, 41.4%)

HSV / HSBhsv(341.1, 77.3%, 67.5%)

CMYK0%, 77.3%, 52.9%, 32.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,282,257

CSS custom property--colour: #AC2751;

Brightness & contrast

Relative luminance0.10816WCAG 2.x, 0 is black and 1 is white

Perceived brightness102.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.64:1

Contrast with white6.64:1WCAG normal text: AA

Contrast with black3.16:1WCAG normal text: Fail

Greyscale equivalent#464646

Inverted#53D8AE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#494C52no red cones; affects about 1% of men; ΔE 57 from the original

Deuteranopia#6C664Eno green cones; the most common form, about 1% of men; ΔE 57.6 from the original

Tritanopia#BC0039no blue cones; rare, and affects men and women equally; ΔE 18.9 from the original

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

Contrast with white, large text6.64:1WCAG large text: AAA

Contrast with black, large text3.16:1WCAG large text: AA

Named colours

Indian red · ΔE 22.1 Brown · ΔE 22.7 Pale violetred · ΔE 24.8 Firebrick · ΔE 29 Medium violet red · ΔE 29.1 Crimson · ΔE 30.5

Nearest named CSS colourIndian red (#CD5C5C)ΔE 22.14, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27AC82

Analogous#AC2793, #AC4027

Triadic#51AC27, #2751AC

Split complementary#27AC40, #2793AC

Tetradic#93AC27, #27AC82, #4027AC

Tints, shades & saturation

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

Lighter +40%#EDB2C4

Lighter +30%#E488A5

Lighter +20%#DB5E86

Lighter +10%#D13566

Darker −10%#821E3D

Darker −20%#59142A

Darker −30%#2F0B16

Darker −40%#060103

More saturated +25%#C60D47

Less saturated −25%#92415B

Channel breakdown

R172

G39

B81

Red172 (67.5%)

Green39 (15.3%)

Blue81 (31.8%)

Hue341.05°

Saturation (HSL)63.03%

Lightness41.37%

Dominant channelRed

Hex per channelR AC · G 27 · B 51

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Ac2751 (chemical formula)

Formula
624,477 g/mol
2751 atoms

Ac2751 has a molar mass of 624,477 g/mol, made up of 2751 atoms across 1 element: 2751 × Ac.

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Molar mass

Molar mass624,477 g/mol

Total atoms per molecule2751

Distinct elements1

Mass of one molecule1.0369685 × 10^-18 g

Molecules per gram9.6434949 × 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 × 2751)624,477 g/mol, 100%

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Elements in this formula

Actinium

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