Recognised as Colour
#AC155B
- #AC155B
- Red
- Dark
- Nearest: Medium violet red
#AC155B is a red with RGB values 172, 21, 91 and HSL 332°, 78%, 38%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Medium violet red.
Colour values
#AC155B#AC155B
HEX#AC155B
RGBrgb(172, 21, 91)
RGB (0–1)0.6745, 0.0824, 0.3569
RGB percentages67.5%, 8.2%, 35.7%
HSLhsl(332.2, 78.2%, 37.8%)
HSV / HSBhsv(332.2, 87.8%, 67.5%)
CMYK0%, 87.8%, 47.1%, 32.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,277,659
CSS custom property--colour: #AC155B;
Brightness & contrast
Relative luminance0.10062WCAG 2.x, 0 is black and 1 is white
Perceived brightness100.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.97:1
Contrast with white6.97:1WCAG normal text: AA
Contrast with black3.01:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#53EAA4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.97:1WCAG large text: AAA
Contrast with black, large text3.01:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#15AC66
Analogous#AC15A7, #AC1B15
Triadic#5BAC15, #155BAC
Split complementary#15AC1A, #15A7AC
Tetradic#A7AC15, #15AC66, #1A15AC
Tints, shades & saturation
Channel breakdown
R172
G21
B91
Red172 (67.5%)
Green21 (8.2%)
Blue91 (35.7%)
Hue332.19°
Saturation (HSL)78.24%
Lightness37.84%
Dominant channelRed
Hex per channelR AC · G 15 · B 5B
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Harmonies
Similar named colours
Also reads as
Ac155B (chemical formula)
- Formula
- 35,195.81 g/mol
- 156 atoms
Ac155B has a molar mass of 35,195.81 g/mol, made up of 156 atoms across 2 elements: 155 × Ac, 1 × B.
Molar mass
Molar mass35,195.81 g/mol
Total atoms per molecule156
Distinct elements2
Mass of one molecule5.8444018 × 10^-20 g
Molecules per gram1.7110391 × 10^19
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%
B0%
Actinium (Ac × 155)35,185 g/mol, 99.969%
Boron (B)10.81 g/mol, 0.031%
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