Recognised as Colour

#B1424B

#B1424B
Red
Dark
Nearest: Indian red

#B1424B is a red with RGB values 177, 66, 75 and HSL 355°, 46%, 48%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Indian red.

Colour values

#B1424B#B1424B

HEX#B1424B

RGBrgb(177, 66, 75)

RGB (0–1)0.6941, 0.2588, 0.2941

RGB percentages69.4%, 25.9%, 29.4%

HSLhsl(355.1, 45.7%, 47.6%)

HSV / HSBhsv(355.1, 62.7%, 69.4%)

CMYK0%, 62.7%, 57.6%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,616,843

CSS custom property--colour: #B1424B;

Brightness & contrast

Relative luminance0.13752WCAG 2.x, 0 is black and 1 is white

Perceived brightness112.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.6:1

Contrast with white5.6:1WCAG normal text: AA

Contrast with black3.75:1WCAG normal text: Fail

Greyscale equivalent#5A5A5A

Inverted#4EBDB4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5D594Bno red cones; affects about 1% of men; ΔE 48.4 from the original

Deuteranopia#797048no green cones; the most common form, about 1% of men; ΔE 49 from the original

Tritanopia#C12D46no blue cones; rare, and affects men and women equally; ΔE 13.3 from the original

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

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

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

Named colours

Indian red · ΔE 10.1 Brown · ΔE 13.9 Firebrick · ΔE 21.9 Light coral · ΔE 22.5 Sienna · ΔE 23.6 Pale violetred · ΔE 24.9

Nearest named CSS colourIndian red (#CD5C5C)ΔE 10.12, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#42B1A8

Analogous#B14282, #B17142

Triadic#4BB142, #424BB1

Split complementary#42B171, #4282B1

Tetradic#82B142, #42B1A8, #7142B1

Tints, shades & saturation

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

Lighter +40%#EED1D3

Lighter +30%#E0ACB0

Lighter +20%#D2878D

Lighter +10%#C4626A

Darker −10%#8C343B

Darker −20%#67262C

Darker −30%#42181C

Darker −40%#1C0B0C

More saturated +25%#CF2432

Less saturated −25%#936064

Channel breakdown

R177

G66

B75

Red177 (69.4%)

Green66 (25.9%)

Blue75 (29.4%)

Hue355.14°

Saturation (HSL)45.68%

Lightness47.65%

Dominant channelRed

Hex per channelR B1 · G 42 · B 4B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B1424B (chemical formula)

Formula
15,404.25 g/mol
1425 atoms

B1424B has a molar mass of 15,404.25 g/mol, made up of 1425 atoms across 1 element: 1425 × B.

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Molar mass

Molar mass15,404.25 g/mol

Total atoms per molecule1425

Distinct elements1

Mass of one molecule2.5579359 × 10^-20 g

Molecules per gram3.9094021 × 10^19

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 × 1425)15,404.25 g/mol, 100%

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Elements in this formula

Boron

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