Recognised as Colour

#B71F58

#B71F58
Red
Dark
Nearest: Medium violet red

#B71F58 is a red with RGB values 183, 31, 88 and HSL 338°, 71%, 42%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Medium violet red.

Colour values

#B71F58#B71F58

HEX#B71F58

RGBrgb(183, 31, 88)

RGB (0–1)0.7176, 0.1216, 0.3451

RGB percentages71.8%, 12.2%, 34.5%

HSLhsl(337.5, 71%, 42%)

HSV / HSBhsv(337.5, 83.1%, 71.8%)

CMYK0%, 83.1%, 51.9%, 28.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,001,112

CSS custom property--colour: #B71F58;

Brightness & contrast

Relative luminance0.11752WCAG 2.x, 0 is black and 1 is white

Perceived brightness107.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.27:1

Contrast with white6.27:1WCAG normal text: AA

Contrast with black3.35:1WCAG normal text: Fail

Greyscale equivalent#434343

Inverted#48E0A7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#494D59no red cones; affects about 1% of men; ΔE 62 from the original

Deuteranopia#706B54no green cones; the most common form, about 1% of men; ΔE 63.7 from the original

Tritanopia#C80039no blue cones; rare, and affects men and women equally; ΔE 23 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text6.27:1WCAG large text: AAA

Contrast with black, large text3.35:1WCAG large text: AA

Named colours

Medium violet red · ΔE 24.3 Indian red · ΔE 25.7 Pale violetred · ΔE 25.9 Brown · ΔE 26.6 Crimson · ΔE 29.3 Hot pink · ΔE 30.3

Nearest named CSS colourMedium violet red (#C71585)ΔE 24.34, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FB77E

Analogous#B71FA4, #B7321F

Triadic#58B71F, #1F58B7

Split complementary#1FB732, #1FA4B7

Tetradic#A4B71F, #1FB77E, #321FB7

Tints, shades & saturation

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

Lighter +40%#F2B0C9

Lighter +30%#EA85AB

Lighter +20%#E3598D

Lighter +10%#DC2D6F

Darker −10%#8B1843

Darker −20%#60102E

Darker −30%#340919

Darker −40%#090104

More saturated +25%#D20451

Less saturated −25%#9C3A5F

Channel breakdown

R183

G31

B88

Red183 (71.8%)

Green31 (12.2%)

Blue88 (34.5%)

Hue337.5°

Saturation (HSL)71.03%

Lightness41.96%

Dominant channelRed

Hex per channelR B7 · G 1F · B 58

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B71F58 (chemical formula)

Formula
1,869.394 g/mol
129 atoms

B71F58 has a molar mass of 1,869.394 g/mol, made up of 129 atoms across 2 elements: 71 × B, 58 × F.

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Molar mass

Molar mass1,869.394 g/mol

Total atoms per molecule129

Distinct elements2

Mass of one molecule3.1042018 × 10^-21 g

Molecules per gram3.2214401 × 10^20

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

B41.1%

F58.9%

Boron (B × 71)767.51 g/mol, 41.057%

Fluorine (F × 58)1,101.884 g/mol, 58.943%

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