Recognised as Colour

#BB5F31

#BB5F31
Orange
Dark
Nearest: Sienna

#BB5F31 is a orange with RGB values 187, 95, 49 and HSL 20°, 58%, 46%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#BB5F31#BB5F31

HEX#BB5F31

RGBrgb(187, 95, 49)

RGB (0–1)0.7333, 0.3725, 0.1922

RGB percentages73.3%, 37.3%, 19.2%

HSLhsl(20, 58.5%, 46.3%)

HSV / HSBhsv(20, 73.8%, 73.3%)

CMYK0%, 49.2%, 73.8%, 26.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,279,601

CSS custom property--colour: #BB5F31;

Brightness & contrast

Relative luminance0.18971WCAG 2.x, 0 is black and 1 is white

Perceived brightness126.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.79:1

Contrast with white4.38:1WCAG normal text: Fail

Contrast with black4.79:1WCAG normal text: AA

Greyscale equivalent#6F6F6F

Inverted#44A0CE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#796C2Cno red cones; affects about 1% of men; ΔE 37.7 from the original

Deuteranopia#8F802Fno green cones; the most common form, about 1% of men; ΔE 38.1 from the original

Tritanopia#CD4C55no blue cones; rare, and affects men and women equally; ΔE 26.8 from the original

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

Contrast with white, large text4.38:1WCAG large text: AA

Contrast with black, large text4.79:1WCAG large text: AAA

Named colours

Sienna · ΔE 10.4 Saddle brown · ΔE 15.1 Chocolate · ΔE 15.9 Peru · ΔE 17.5 Coral · ΔE 21 Indian red · ΔE 23.1

Nearest named CSS colourSienna (#A0522D)ΔE 10.41, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#318DBB

Analogous#BB3148, #BBA431

Triadic#31BB5F, #5F31BB

Split complementary#31BBA4, #3148BB

Tetradic#48BB31, #318DBB, #A431BB

Tints, shades & saturation

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

Lighter +40%#F0D5C8

Lighter +30%#E6B79F

Lighter +20%#DB9877

Lighter +10%#D17A4E

Darker −10%#934A26

Darker −20%#6A361C

Darker −30%#422111

Darker −40%#190D07

More saturated +25%#D85514

Less saturated −25%#9E694F

Channel breakdown

R187

G95

B49

Red187 (73.3%)

Green95 (37.3%)

Blue49 (19.2%)

Hue20°

Saturation (HSL)58.47%

Lightness46.27%

Dominant channelRed

Hex per channelR BB · G 5F · B 31

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Harmonies

Lighter and darker

Similar named colours

Also reads as

BB5F31 (chemical formula)

Formula
653.798 g/mol
37 atoms

BB5F31 has a molar mass of 653.798 g/mol, made up of 37 atoms across 2 elements: 6 × B, 31 × F.

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Molar mass

Molar mass653.798 g/mol

Total atoms per molecule37

Distinct elements2

Mass of one molecule1.0856571 × 10^-21 g

Molecules per gram9.2110113 × 10^20

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

B9.9%

F90.1%

Boron (B × 6)64.86 g/mol, 9.92%

Fluorine (F × 31)588.938 g/mol, 90.08%

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Elements in this formula

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