Recognised as Colour

#BF391C

#BF391C
Red
Dark
Nearest: Firebrick

#BF391C is a red with RGB values 191, 57, 28 and HSL 11°, 74%, 43%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#BF391C#BF391C

HEX#BF391C

RGBrgb(191, 57, 28)

RGB (0–1)0.749, 0.2235, 0.1098

RGB percentages74.9%, 22.4%, 11%

HSLhsl(10.7, 74.4%, 42.9%)

HSV / HSBhsv(10.7, 85.3%, 74.9%)

CMYK0%, 70.2%, 85.3%, 25.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,531,996

CSS custom property--colour: #BF391C;

Brightness & contrast

Relative luminance0.14086WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.5:1

Contrast with white5.5:1WCAG normal text: AA

Contrast with black3.82:1WCAG normal text: Fail

Greyscale equivalent#535353

Inverted#40C6E3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#615616no red cones; affects about 1% of men; ΔE 56.9 from the original

Deuteranopia#827414no green cones; the most common form, about 1% of men; ΔE 57.3 from the original

Tritanopia#D30034no blue cones; rare, and affects men and women equally; ΔE 21.7 from the original

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

Contrast with white, large text5.5:1WCAG large text: AAA

Contrast with black, large text3.82:1WCAG large text: AA

Named colours

Firebrick · ΔE 11 Dark red · ΔE 17.1 Brown · ΔE 17.5 Tomato · ΔE 18.7 Maroon · ΔE 21 Chocolate · ΔE 21.6

Nearest named CSS colourFirebrick (#B22222)ΔE 10.96, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1CA2BF

Analogous#BF1C51, #BF8B1C

Triadic#1CBF39, #391CBF

Split complementary#1CBF8A, #1C51BF

Tetradic#51BF1C, #1CA2BF, #8A1CBF

Tints, shades & saturation

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

Lighter +40%#F4BFB3

Lighter +30%#ED9987

Lighter +20%#E7735A

Lighter +10%#E04D2E

Darker −10%#932C15

Darker −20%#661E0F

Darker −30%#3A1108

Darker −40%#0D0402

More saturated +25%#DA2701

Less saturated −25%#A44B37

Channel breakdown

R191

G57

B28

Red191 (74.9%)

Green57 (22.4%)

Blue28 (11%)

Hue10.67°

Saturation (HSL)74.43%

Lightness42.94%

Dominant channelRed

Hex per channelR BF · G 39 · B 1C

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Harmonies

Lighter and darker

Similar named colours

Also reads as

BF391C (chemical formula)

Formula
7,451.039 g/mol
393 atoms

BF391C has a molar mass of 7,451.039 g/mol, made up of 393 atoms across 3 elements: 1 × B, 391 × F, 1 × C.

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Molar mass

Molar mass7,451.039 g/mol

Total atoms per molecule393

Distinct elements3

Mass of one molecule1.2372741 × 10^-20 g

Molecules per gram8.0822832 × 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

B0.1%

F99.7%

C0.2%

Boron (B)10.81 g/mol, 0.145%

Fluorine (F × 391)7,428.218 g/mol, 99.694%

Carbon (C)12.011 g/mol, 0.161%

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