Recognised as Colour

#B77581

#B77581
Red
Dark
Nearest: Rosy brown

#B77581 is a red with RGB values 183, 117, 129 and HSL 349°, 31%, 59%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Rosy brown.

Colour values

#B77581#B77581

HEX#B77581

RGBrgb(183, 117, 129)

RGB (0–1)0.7176, 0.4588, 0.5059

RGB percentages71.8%, 45.9%, 50.6%

HSLhsl(349.1, 31.4%, 58.8%)

HSV / HSBhsv(349.1, 36.1%, 71.8%)

CMYK0%, 36.1%, 29.5%, 28.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,023,169

CSS custom property--colour: #B77581;

Brightness & contrast

Relative luminance0.24375WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.87:1

Contrast with white3.57:1WCAG normal text: Fail

Contrast with black5.87:1WCAG normal text: AA

Greyscale equivalent#848484

Inverted#488A7E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#808081no red cones; affects about 1% of men; ΔE 27.9 from the original

Deuteranopia#908C80no green cones; the most common form, about 1% of men; ΔE 28.4 from the original

Tritanopia#C27079no blue cones; rare, and affects men and women equally; ΔE 7.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text3.57:1WCAG large text: AA

Contrast with black, large text5.87:1WCAG large text: AAA

Named colours

Rosy brown · ΔE 12.9 Pale violetred · ΔE 18.9 Light coral · ΔE 23.7 Light pink · ΔE 24.6 Indian red · ΔE 25 Dark salmon · ΔE 27

Nearest named CSS colourRosy brown (#BC8F8F)ΔE 12.93, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#75B7AB

Analogous#B775A2, #B78A75

Triadic#81B775, #7581B7

Split complementary#75B78A, #75A2B7

Tetradic#A2B775, #75B7AB, #8A75B7

Tints, shades & saturation

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

Lighter +40%#FDFBFB

Lighter +30%#EBDADD

Lighter +20%#DAB8BE

Lighter +10%#C897A0

Darker −10%#A45564

Darker −20%#82444F

Darker −30%#61323B

Darker −40%#3F2126

More saturated +25%#D15B70

Less saturated −25%#9D8F92

Channel breakdown

R183

G117

B129

Red183 (71.8%)

Green117 (45.9%)

Blue129 (50.6%)

Hue349.09°

Saturation (HSL)31.43%

Lightness58.82%

Dominant channelRed

Hex per channelR B7 · G 75 · B 81

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B77581 (chemical formula)

Formula
838,650.61 g/mol
77581 atoms

B77581 has a molar mass of 838,650.61 g/mol, made up of 77581 atoms across 1 element: 77581 × B.

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Molar mass

Molar mass838,650.61 g/mol

Total atoms per molecule77581

Distinct elements1

Mass of one molecule1.3926121 × 10^-18 g

Molecules per gram7.1807505 × 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 × 77581)838,650.61 g/mol, 100%

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Elements in this formula

Boron

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