Recognised as Colour
#AC9191
- #AC9191
- Red
- Dark
- Nearest: Rosy brown
#AC9191 is a red with RGB values 172, 145, 145 and HSL 0°, 14%, 62%. It is a dark colour, so black text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Rosy brown.
Colour values
#AC9191#AC9191
HEX#AC9191
RGBrgb(172, 145, 145)
RGB (0–1)0.6745, 0.5686, 0.5686
RGB percentages67.5%, 56.9%, 56.9%
HSLhsl(0, 14%, 62.2%)
HSV / HSBhsv(0, 15.7%, 67.5%)
CMYK0%, 15.7%, 15.7%, 32.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,309,457
CSS custom property--colour: #AC9191;
Brightness & contrast
Relative luminance0.31066WCAG 2.x, 0 is black and 1 is white
Perceived brightness153.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.21:1
Contrast with white2.91:1WCAG normal text: Fail
Contrast with black7.21:1WCAG normal text: AAA
Greyscale equivalent#979797
Inverted#536E6E
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.91:1WCAG large text: Fail
Contrast with black, large text7.21:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#91ACAC
Analogous#AC919F, #AC9F91
Triadic#91AC91, #9191AC
Split complementary#91AC9F, #919FAC
Tetradic#9FAC91, #91ACAC, #9F91AC
Tints, shades & saturation
Channel breakdown
R172
G145
B145
Red172 (67.5%)
Green145 (56.9%)
Blue145 (56.9%)
Hue0°
Saturation (HSL)13.99%
Lightness62.16%
Dominant channelRed
Hex per channelR AC · G 91 · B 91
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Also reads as
Ac9191 (chemical formula)
- Formula
- 2,086,357 g/mol
- 9191 atoms
Ac9191 has a molar mass of 2,086,357 g/mol, made up of 9191 atoms across 1 element: 9191 × Ac.
Molar mass
Molar mass2,086,357 g/mol
Total atoms per molecule9191
Distinct elements1
Mass of one molecule3.4644773 × 10^-18 g
Molecules per gram2.8864383 × 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 × 9191)2,086,357 g/mol, 100%
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