Recognised as Colour

#BF391F

#BF391F
Red
Dark
Nearest: Firebrick

#BF391F is a red with RGB values 191, 57, 31 and HSL 10°, 72%, 44%. 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

#BF391F#BF391F

HEX#BF391F

RGBrgb(191, 57, 31)

RGB (0–1)0.749, 0.2235, 0.1216

RGB percentages74.9%, 22.4%, 12.2%

HSLhsl(9.8, 72.1%, 43.5%)

HSV / HSBhsv(9.8, 83.8%, 74.9%)

CMYK0%, 70.2%, 83.8%, 25.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,531,999

CSS custom property--colour: #BF391F;

Brightness & contrast

Relative luminance0.14102WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.7 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#545454

Inverted#40C6E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#61561Ano red cones; affects about 1% of men; ΔE 56.8 from the original

Deuteranopia#827418no green cones; the most common form, about 1% of men; ΔE 57.2 from the original

Tritanopia#D30034no blue cones; rare, and affects men and women equally; ΔE 20.9 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 9.8 Brown · ΔE 16.3 Dark red · ΔE 16.8 Tomato · ΔE 18.7 Maroon · ΔE 20.5 Crimson · ΔE 22.1

Nearest named CSS colourFirebrick (#B22222)ΔE 9.85, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FA5BF

Analogous#BF1F55, #BF891F

Triadic#1FBF39, #391FBF

Split complementary#1FBF89, #1F55BF

Tetradic#55BF1F, #1FA5BF, #891FBF

Tints, shades & saturation

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

Lighter +40%#F3C1B7

Lighter +30%#EC9B8B

Lighter +20%#E5755F

Lighter +10%#DE4F33

Darker −10%#932C18

Darker −20%#671F11

Darker −30%#3B120A

Darker −40%#0F0503

More saturated +25%#DB2603

Less saturated −25%#A34C3B

Channel breakdown

R191

G57

B31

Red191 (74.9%)

Green57 (22.4%)

Blue31 (12.2%)

Hue9.75°

Saturation (HSL)72.07%

Lightness43.53%

Dominant channelRed

Hex per channelR BF · G 39 · B 1F

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

BF391F (chemical formula)

Formula
7,458.026 g/mol
393 atoms

BF391F has a molar mass of 7,458.026 g/mol, made up of 393 atoms across 2 elements: 1 × B, 392 × F.

Open this reading on its own page →

Molar mass

Molar mass7,458.026 g/mol

Total atoms per molecule393

Distinct elements2

Mass of one molecule1.2384344 × 10^-20 g

Molecules per gram8.0747114 × 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%

F99.9%

Boron (B)10.81 g/mol, 0.145%

Fluorine (F × 392)7,447.216 g/mol, 99.855%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Nerdulate something else

Nothing in mind? Surprise me · today’s page