Recognised as Colour

#B3340F

#B3340F
Red
Dark
Nearest: Firebrick

#B3340F is a red with RGB values 179, 52, 15 and HSL 14°, 85%, 38%. It is a dark colour, so white text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B3340F#B3340F

HEX#B3340F

RGBrgb(179, 52, 15)

RGB (0–1)0.702, 0.2039, 0.0588

RGB percentages70.2%, 20.4%, 5.9%

HSLhsl(13.5, 84.5%, 38%)

HSV / HSBhsv(13.5, 91.6%, 70.2%)

CMYK0%, 70.9%, 91.6%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,744,271

CSS custom property--colour: #B3340F;

Brightness & contrast

Relative luminance0.12074WCAG 2.x, 0 is black and 1 is white

Perceived brightness105.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.15:1

Contrast with white6.15:1WCAG normal text: AA

Contrast with black3.41:1WCAG normal text: Fail

Greyscale equivalent#4C4C4C

Inverted#4CCBF0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5B4F05no red cones; affects about 1% of men; ΔE 53.9 from the original

Deuteranopia#7A6C03no green cones; the most common form, about 1% of men; ΔE 54.6 from the original

Tritanopia#C6002Eno blue cones; rare, and affects men and women equally; ΔE 22.3 from the original

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

Contrast with white, large text6.15:1WCAG large text: AAA

Contrast with black, large text3.41:1WCAG large text: AA

Named colours

Firebrick · ΔE 12.7 Dark red · ΔE 15.1 Brown · ΔE 18.4 Maroon · ΔE 19 Chocolate · ΔE 21.1 Tomato · ΔE 22.5

Nearest named CSS colourFirebrick (#B22222)ΔE 12.69, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0F8EB3

Analogous#B30F3C, #B3860F

Triadic#0FB334, #340FB3

Split complementary#0FB386, #0F3CB3

Tetradic#3CB30F, #0F8EB3, #860FB3

Tints, shades & saturation

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

Lighter +40%#F6AD98

Lighter +30%#F28869

Lighter +20%#EE623A

Lighter +10%#E24213

Darker −10%#84260B

Darker −20%#551907

Darker −30%#260B03

Darker −40%#000000

More saturated +25%#C22C00

Less saturated −25%#9B4127

Channel breakdown

R179

G52

B15

Red179 (70.2%)

Green52 (20.4%)

Blue15 (5.9%)

Hue13.54°

Saturation (HSL)84.54%

Lightness38.04%

Dominant channelRed

Hex per channelR B3 · G 34 · B 0F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B3340F (chemical formula)

Formula
36,124.398 g/mol
3341 atoms

B3340F has a molar mass of 36,124.398 g/mol, made up of 3341 atoms across 2 elements: 3340 × B, 1 × F.

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Molar mass

Molar mass36,124.398 g/mol

Total atoms per molecule3341

Distinct elements2

Mass of one molecule5.9985974 × 10^-20 g

Molecules per gram1.6670564 × 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

B99.9%

F0.1%

Boron (B × 3340)36,105.4 g/mol, 99.947%

Fluorine (F)18.998 g/mol, 0.053%

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