Recognised as Colour

#B42157

#B42157
Red
Dark
Nearest: Medium violet red

#B42157 is a red with RGB values 180, 33, 87 and HSL 338°, 69%, 42%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Medium violet red.

Colour values

#B42157#B42157

HEX#B42157

RGBrgb(180, 33, 87)

RGB (0–1)0.7059, 0.1294, 0.3412

RGB percentages70.6%, 12.9%, 34.1%

HSLhsl(338, 69%, 41.8%)

HSV / HSBhsv(338, 81.7%, 70.6%)

CMYK0%, 81.7%, 51.7%, 29.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,805,015

CSS custom property--colour: #B42157;

Brightness & contrast

Relative luminance0.11479WCAG 2.x, 0 is black and 1 is white

Perceived brightness105.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.37:1

Contrast with white6.37:1WCAG normal text: AA

Contrast with black3.3:1WCAG normal text: Fail

Greyscale equivalent#444444

Inverted#4BDEA8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#494D58no red cones; affects about 1% of men; ΔE 60.7 from the original

Deuteranopia#6F6954no green cones; the most common form, about 1% of men; ΔE 61.5 from the original

Tritanopia#C4003Ano blue cones; rare, and affects men and women equally; ΔE 21.4 from the original

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

Contrast with white, large text6.37:1WCAG large text: AAA

Contrast with black, large text3.3:1WCAG large text: AA

Named colours

Medium violet red · ΔE 24.9 Indian red · ΔE 25.1 Pale violetred · ΔE 25.4 Brown · ΔE 26.1 Crimson · ΔE 30 Hot pink · ΔE 30.8

Nearest named CSS colourMedium violet red (#C71585)ΔE 24.93, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21B47E

Analogous#B421A1, #B43521

Triadic#57B421, #2157B4

Split complementary#21B435, #21A1B4

Tetradic#A0B421, #21B47E, #3521B4

Tints, shades & saturation

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

Lighter +40%#F1B0C8

Lighter +30%#E985AA

Lighter +20%#E15A8C

Lighter +10%#D92F6D

Darker −10%#891942

Darker −20%#5E112D

Darker −30%#330919

Darker −40%#080104

More saturated +25%#CF0650

Less saturated −25%#993C5E

Channel breakdown

R180

G33

B87

Red180 (70.6%)

Green33 (12.9%)

Blue87 (34.1%)

Hue337.96°

Saturation (HSL)69.01%

Lightness41.76%

Dominant channelRed

Hex per channelR B4 · G 21 · B 57

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B42157 (chemical formula)

Formula
455,717.17 g/mol
42157 atoms

B42157 has a molar mass of 455,717.17 g/mol, made up of 42157 atoms across 1 element: 42157 × B.

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Molar mass

Molar mass455,717.17 g/mol

Total atoms per molecule42157

Distinct elements1

Mass of one molecule7.5673616 × 10^-19 g

Molecules per gram1.3214645 × 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 × 42157)455,717.17 g/mol, 100%

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Elements in this formula

Boron

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