Recognised as Colour

#BB3B28

#BB3B28
Red
Dark
Nearest: Firebrick

#BB3B28 is a red with RGB values 187, 59, 40 and HSL 8°, 65%, 45%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#BB3B28#BB3B28

HEX#BB3B28

RGBrgb(187, 59, 40)

RGB (0–1)0.7333, 0.2314, 0.1569

RGB percentages73.3%, 23.1%, 15.7%

HSLhsl(7.8, 64.8%, 44.5%)

HSV / HSBhsv(7.8, 78.6%, 73.3%)

CMYK0%, 68.4%, 78.6%, 26.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,270,376

CSS custom property--colour: #BB3B28;

Brightness & contrast

Relative luminance0.13846WCAG 2.x, 0 is black and 1 is white

Perceived brightness112.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.57:1

Contrast with white5.57:1WCAG normal text: AA

Contrast with black3.77:1WCAG normal text: Fail

Greyscale equivalent#555555

Inverted#44C4D7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#605625no red cones; affects about 1% of men; ΔE 54.7 from the original

Deuteranopia#807223no green cones; the most common form, about 1% of men; ΔE 54.7 from the original

Tritanopia#CE0F38no blue cones; rare, and affects men and women equally; ΔE 19.4 from the original

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

Contrast with white, large text5.57:1WCAG large text: AAA

Contrast with black, large text3.77:1WCAG large text: AA

Named colours

Firebrick · ΔE 7.7 Brown · ΔE 11.4 Dark red · ΔE 16 Maroon · ΔE 18.7 Tomato · ΔE 20.7 Indian red · ΔE 20.8

Nearest named CSS colourFirebrick (#B22222)ΔE 7.75, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#28A8BB

Analogous#BB285F, #BB8428

Triadic#28BB3B, #3B28BB

Split complementary#28BB85, #285EBB

Tetradic#5FBB28, #28A8BB, #8528BB

Tints, shades & saturation

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

Lighter +40%#F1C5BE

Lighter +30%#E89F94

Lighter +20%#DF796A

Lighter +10%#D65340

Darker −10%#912E1F

Darker −20%#672016

Darker −30%#3D130D

Darker −40%#130604

More saturated +25%#D7260C

Less saturated −25%#9F5044

Channel breakdown

R187

G59

B40

Red187 (73.3%)

Green59 (23.1%)

Blue40 (15.7%)

Hue7.76°

Saturation (HSL)64.76%

Lightness44.51%

Dominant channelRed

Hex per channelR BB · G 3B · B 28

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Harmonies

Lighter and darker

Similar named colours

Also reads as

BB3B28 (chemical formula)

Formula
345.92 g/mol
32 atoms

BB3B28 has a molar mass of 345.92 g/mol, made up of 32 atoms across 1 element: 32 × B.

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Molar mass

Molar mass345.92 g/mol

Total atoms per molecule32

Distinct elements1

Mass of one molecule5.7441367 × 10^-22 g

Molecules per gram1.7409056 × 10^21

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 × 32)345.92 g/mol, 100%

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Elements in this formula

Boron

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