Recognised as Colour

#B4213F

#B4213F
Red
Dark
Nearest: Brown

#B4213F is a red with RGB values 180, 33, 63 and HSL 348°, 69%, 42%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B4213F#B4213F

HEX#B4213F

RGBrgb(180, 33, 63)

RGB (0–1)0.7059, 0.1294, 0.2471

RGB percentages70.6%, 12.9%, 24.7%

HSLhsl(347.8, 69%, 41.8%)

HSV / HSBhsv(347.8, 81.7%, 70.6%)

CMYK0%, 81.7%, 65%, 29.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,804,991

CSS custom property--colour: #B4213F;

Brightness & contrast

Relative luminance0.1115WCAG 2.x, 0 is black and 1 is white

Perceived brightness103.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.5:1

Contrast with white6.5:1WCAG normal text: AA

Contrast with black3.23:1WCAG normal text: Fail

Greyscale equivalent#424242

Inverted#4BDEC0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4E4A3Fno red cones; affects about 1% of men; ΔE 60.7 from the original

Deuteranopia#72693Bno green cones; the most common form, about 1% of men; ΔE 61.9 from the original

Tritanopia#C6002Eno blue cones; rare, and affects men and women equally; ΔE 16.3 from the original

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

Contrast with white, large text6.5:1WCAG large text: AAA

Contrast with black, large text3.23:1WCAG large text: AA

Named colours

Brown · ΔE 12.8 Firebrick · ΔE 16.7 Indian red · ΔE 19 Crimson · ΔE 19.4 Maroon · ΔE 24.3 Dark red · ΔE 24.4

Nearest named CSS colourBrown (#A52A2A)ΔE 12.83, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21B496

Analogous#B42188, #B44D21

Triadic#3FB421, #213FB4

Split complementary#21B44C, #2188B4

Tetradic#89B421, #21B496, #4D21B4

Tints, shades & saturation

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

Lighter +40%#F1B0BE

Lighter +30%#E9859A

Lighter +20%#E15A76

Lighter +10%#D92F52

Darker −10%#891930

Darker −20%#5E1121

Darker −30%#330912

Darker −40%#080103

More saturated +25%#CF062F

Less saturated −25%#993C4F

Channel breakdown

R180

G33

B63

Red180 (70.6%)

Green33 (12.9%)

Blue63 (24.7%)

Hue347.76°

Saturation (HSL)69.01%

Lightness41.76%

Dominant channelRed

Hex per channelR B4 · G 21 · B 3F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B4213F (chemical formula)

Formula
45,561.528 g/mol
4214 atoms

B4213F has a molar mass of 45,561.528 g/mol, made up of 4214 atoms across 2 elements: 4213 × B, 1 × F.

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Molar mass

Molar mass45,561.528 g/mol

Total atoms per molecule4214

Distinct elements2

Mass of one molecule7.5656697 × 10^-20 g

Molecules per gram1.3217601 × 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%

F0%

Boron (B × 4213)45,542.53 g/mol, 99.958%

Fluorine (F)18.998 g/mol, 0.042%

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Elements in this formula

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