Recognised as Colour

#B42319

#B42319
Red
Dark
Nearest: Firebrick

#B42319 is a red with RGB values 180, 35, 25 and HSL 4°, 76%, 40%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B42319#B42319

HEX#B42319

RGBrgb(180, 35, 25)

RGB (0–1)0.7059, 0.1373, 0.098

RGB percentages70.6%, 13.7%, 9.8%

HSLhsl(3.9, 75.6%, 40.2%)

HSV / HSBhsv(3.9, 86.1%, 70.6%)

CMYK0%, 80.6%, 86.1%, 29.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,805,465

CSS custom property--colour: #B42319;

Brightness & contrast

Relative luminance0.10976WCAG 2.x, 0 is black and 1 is white

Perceived brightness102.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.57:1

Contrast with white6.57:1WCAG normal text: AA

Contrast with black3.2:1WCAG normal text: Fail

Greyscale equivalent#414141

Inverted#4BDCE6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#524915no red cones; affects about 1% of men; ΔE 60.9 from the original

Deuteranopia#76680Fno green cones; the most common form, about 1% of men; ΔE 60.3 from the original

Tritanopia#C70023no blue cones; rare, and affects men and women equally; ΔE 11.3 from the original

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

Contrast with white, large text6.57:1WCAG large text: AAA

Contrast with black, large text3.2:1WCAG large text: AA

Named colours

Firebrick · ΔE 5.3 Dark red · ΔE 12.6 Brown · ΔE 14.1 Maroon · ΔE 16.8 Crimson · ΔE 19.1 Tomato · ΔE 23

Nearest named CSS colourFirebrick (#B22222)ΔE 5.31, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#19AAB4

Analogous#B4195D, #B47119

Triadic#19B423, #2319B4

Split complementary#19B471, #195DB4

Tetradic#5CB419, #19AAB4, #7119B4

Tints, shades & saturation

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

Lighter +40%#F3ABA6

Lighter +30%#EC817A

Lighter +20%#E6574D

Lighter +10%#E02C20

Darker −10%#871A13

Darker −20%#5A120D

Darker −30%#2E0906

Darker −40%#010000

More saturated +25%#CD0D00

Less saturated −25%#9A3933

Channel breakdown

R180

G35

B25

Red180 (70.6%)

Green35 (13.7%)

Blue25 (9.8%)

Hue3.87°

Saturation (HSL)75.61%

Lightness40.2%

Dominant channelRed

Hex per channelR B4 · G 23 · B 19

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B42319 (chemical formula)

Formula
457,468.39 g/mol
42319 atoms

B42319 has a molar mass of 457,468.39 g/mol, made up of 42319 atoms across 1 element: 42319 × B.

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Molar mass

Molar mass457,468.39 g/mol

Total atoms per molecule42319

Distinct elements1

Mass of one molecule7.5964413 × 10^-19 g

Molecules per gram1.3164059 × 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 × 42319)457,468.39 g/mol, 100%

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Elements in this formula

Boron

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