Recognised as Colour

#B37181

#B37181
Red
Dark
Nearest: Rosy brown

#B37181 is a red with RGB values 179, 113, 129 and HSL 345°, 30%, 57%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Rosy brown.

Colour values

#B37181#B37181

HEX#B37181

RGBrgb(179, 113, 129)

RGB (0–1)0.702, 0.4431, 0.5059

RGB percentages70.2%, 44.3%, 50.6%

HSLhsl(345.5, 30.3%, 57.3%)

HSV / HSBhsv(345.5, 36.9%, 70.2%)

CMYK0%, 36.9%, 27.9%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,760,001

CSS custom property--colour: #B37181;

Brightness & contrast

Relative luminance0.22979WCAG 2.x, 0 is black and 1 is white

Perceived brightness137.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.6:1

Contrast with white3.75:1WCAG normal text: Fail

Contrast with black5.6:1WCAG normal text: AA

Greyscale equivalent#808080

Inverted#4C8E7E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7B7C81no red cones; affects about 1% of men; ΔE 28.2 from the original

Deuteranopia#8B8880no green cones; the most common form, about 1% of men; ΔE 28.8 from the original

Tritanopia#BE6C77no blue cones; rare, and affects men and women equally; ΔE 8.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.75:1WCAG large text: AA

Contrast with black, large text5.6:1WCAG large text: AAA

Named colours

Rosy brown · ΔE 14.8 Pale violetred · ΔE 18.2 Light coral · ΔE 25.2 Indian red · ΔE 26 Light pink · ΔE 26.2 Gray · ΔE 28.4

Nearest named CSS colourRosy brown (#BC8F8F)ΔE 14.79, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#71B3A3

Analogous#B371A2, #B38271

Triadic#81B371, #7181B3

Split complementary#71B382, #71A2B3

Tetradic#A2B371, #71B3A3, #8271B3

Tints, shades & saturation

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

Lighter +40%#FAF6F7

Lighter +30%#E8D5D9

Lighter +20%#D7B3BC

Lighter +10%#C5929E

Darker −10%#9D5466

Darker −20%#7C4250

Darker −30%#5B303B

Darker −40%#391F25

More saturated +25%#CE5673

Less saturated −25%#988C8F

Channel breakdown

R179

G113

B129

Red179 (70.2%)

Green113 (44.3%)

Blue129 (50.6%)

Hue345.45°

Saturation (HSL)30.28%

Lightness57.25%

Dominant channelRed

Hex per channelR B3 · G 71 · B 81

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B37181 (chemical formula)

Formula
401,926.61 g/mol
37181 atoms

B37181 has a molar mass of 401,926.61 g/mol, made up of 37181 atoms across 1 element: 37181 × B.

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Molar mass

Molar mass401,926.61 g/mol

Total atoms per molecule37181

Distinct elements1

Mass of one molecule6.6741484 × 10^-19 g

Molecules per gram1.4983185 × 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

B100%

Boron (B × 37181)401,926.61 g/mol, 100%

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Elements in this formula

Boron

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