Recognised as Colour

#B34737

#B34737
Red
Dark
Nearest: Brown

#B34737 is a red with RGB values 179, 71, 55 and HSL 8°, 53%, 46%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B34737#B34737

HEX#B34737

RGBrgb(179, 71, 55)

RGB (0–1)0.702, 0.2784, 0.2157

RGB percentages70.2%, 27.8%, 21.6%

HSLhsl(7.7, 53%, 45.9%)

HSV / HSBhsv(7.7, 69.3%, 70.2%)

CMYK0%, 60.3%, 69.3%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,749,175

CSS custom property--colour: #B34737;

Brightness & contrast

Relative luminance0.14366WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.42:1

Contrast with white5.42:1WCAG normal text: AA

Contrast with black3.87:1WCAG normal text: Fail

Greyscale equivalent#5D5D5D

Inverted#4CB8C8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#645B35no red cones; affects about 1% of men; ΔE 46.5 from the original

Deuteranopia#7F7334no green cones; the most common form, about 1% of men; ΔE 47.1 from the original

Tritanopia#C42F44no blue cones; rare, and affects men and women equally; ΔE 17.5 from the original

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

Contrast with white, large text5.42:1WCAG large text: AAA

Contrast with black, large text3.87:1WCAG large text: AA

Named colours

Brown · ΔE 10 Indian red · ΔE 13.2 Sienna · ΔE 14.1 Firebrick · ΔE 15.3 Saddle brown · ΔE 20.2 Dark red · ΔE 20.7

Nearest named CSS colourBrown (#A52A2A)ΔE 10, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#37A3B3

Analogous#B33765, #B38537

Triadic#37B347, #4737B3

Split complementary#37B385, #3765B3

Tetradic#65B337, #37A3B3, #8537B3

Tints, shades & saturation

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

Lighter +40%#EECDC8

Lighter +30%#E2A9A1

Lighter +20%#D6867A

Lighter +10%#CA6253

Darker −10%#8C382B

Darker −20%#65281F

Darker −30%#3E1913

Darker −40%#170907

More saturated +25%#D0311A

Less saturated −25%#965D54

Channel breakdown

R179

G71

B55

Red179 (70.2%)

Green71 (27.8%)

Blue55 (21.6%)

Hue7.74°

Saturation (HSL)52.99%

Lightness45.88%

Dominant channelRed

Hex per channelR B3 · G 47 · B 37

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B34737 (chemical formula)

Formula
375,506.97 g/mol
34737 atoms

B34737 has a molar mass of 375,506.97 g/mol, made up of 34737 atoms across 1 element: 34737 × B.

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Molar mass

Molar mass375,506.97 g/mol

Total atoms per molecule34737

Distinct elements1

Mass of one molecule6.2354399 × 10^-19 g

Molecules per gram1.6037361 × 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 × 34737)375,506.97 g/mol, 100%

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Elements in this formula

Boron

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