Recognised as Colour

#B57566

#B57566
Red
Dark
Nearest: Rosy brown

#B57566 is a red with RGB values 181, 117, 102 and HSL 11°, 35%, 55%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Rosy brown.

Colour values

#B57566#B57566

HEX#B57566

RGBrgb(181, 117, 102)

RGB (0–1)0.7098, 0.4588, 0.4

RGB percentages71%, 45.9%, 40%

HSLhsl(11.4, 34.8%, 55.5%)

HSV / HSBhsv(11.4, 43.6%, 71%)

CMYK0%, 35.4%, 43.6%, 29%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,892,070

CSS custom property--colour: #B57566;

Brightness & contrast

Relative luminance0.23506WCAG 2.x, 0 is black and 1 is white

Perceived brightness137.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.7:1

Contrast with white3.68:1WCAG normal text: Fail

Contrast with black5.7:1WCAG normal text: AA

Greyscale equivalent#828282

Inverted#4A8A99

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#847D65no red cones; affects about 1% of men; ΔE 25.5 from the original

Deuteranopia#938A65no green cones; the most common form, about 1% of men; ΔE 26.2 from the original

Tritanopia#C36C71no blue cones; rare, and affects men and women equally; ΔE 13.1 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.68:1WCAG large text: AA

Contrast with black, large text5.7:1WCAG large text: AAA

Named colours

Rosy brown · ΔE 15.8 Dark salmon · ΔE 17.5 Sienna · ΔE 21.5 Indian red · ΔE 21.8 Light coral · ΔE 22.1 Light salmon · ΔE 26.1

Nearest named CSS colourRosy brown (#BC8F8F)ΔE 15.84, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#66A6B5

Analogous#B5667F, #B59C66

Triadic#66B575, #7566B5

Split complementary#66B59C, #667FB5

Tetradic#7FB566, #66A6B5, #9C66B5

Tints, shades & saturation

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

Lighter +40%#F8F1EF

Lighter +30%#E7D2CD

Lighter +20%#D6B3AB

Lighter +10%#C69488

Darker −10%#9C5B4C

Darker −20%#7A473B

Darker −30%#58332A

Darker −40%#351F1A

More saturated +25%#D1634A

Less saturated −25%#998782

Channel breakdown

R181

G117

B102

Red181 (71%)

Green117 (45.9%)

Blue102 (40%)

Hue11.39°

Saturation (HSL)34.8%

Lightness55.49%

Dominant channelRed

Hex per channelR B5 · G 75 · B 66

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B57566 (chemical formula)

Formula
622,288.46 g/mol
57566 atoms

B57566 has a molar mass of 622,288.46 g/mol, made up of 57566 atoms across 1 element: 57566 × B.

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Molar mass

Molar mass622,288.46 g/mol

Total atoms per molecule57566

Distinct elements1

Mass of one molecule1.0333343 × 10^-18 g

Molecules per gram9.6774103 × 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

B100%

Boron (B × 57566)622,288.46 g/mol, 100%

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Elements in this formula

Boron

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