Recognised as Colour

#B55129

#B55129
Orange
Dark
Nearest: Sienna

#B55129 is a orange with RGB values 181, 81, 41 and HSL 17°, 63%, 44%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Sienna.

Colour values

#B55129#B55129

HEX#B55129

RGBrgb(181, 81, 41)

RGB (0–1)0.7098, 0.3176, 0.1608

RGB percentages71%, 31.8%, 16.1%

HSLhsl(17.1, 63.1%, 43.5%)

HSV / HSBhsv(17.1, 77.3%, 71%)

CMYK0%, 55.2%, 77.3%, 29%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,882,793

CSS custom property--colour: #B55129;

Brightness & contrast

Relative luminance0.15869WCAG 2.x, 0 is black and 1 is white

Perceived brightness117.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.03:1

Contrast with white5.03:1WCAG normal text: AA

Contrast with black4.17:1WCAG normal text: Fail

Greyscale equivalent#636363

Inverted#4AAED6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D6124no red cones; affects about 1% of men; ΔE 42.2 from the original

Deuteranopia#857726no green cones; the most common form, about 1% of men; ΔE 42.7 from the original

Tritanopia#C73B49no blue cones; rare, and affects men and women equally; ΔE 24.9 from the original

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

Contrast with white, large text5.03:1WCAG large text: AAA

Contrast with black, large text4.17:1WCAG large text: AA

Named colours

Sienna · ΔE 11.2 Saddle brown · ΔE 15 Chocolate · ΔE 17.5 Brown · ΔE 18.7 Firebrick · ΔE 19.8 Indian red · ΔE 21.9

Nearest named CSS colourSienna (#A0522D)ΔE 11.22, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#298DB5

Analogous#B52947, #B59729

Triadic#29B551, #5129B5

Split complementary#29B597, #2947B5

Tetradic#47B529, #298DB5, #9729B5

Tints, shades & saturation

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

Lighter +40%#EFCABB

Lighter +30%#E6A991

Lighter +20%#DD8967

Lighter +10%#D3683E

Darker −10%#8B3E20

Darker −20%#622C16

Darker −30%#38190D

Darker −40%#0F0703

More saturated +25%#D1450D

Less saturated −25%#995D45

Channel breakdown

R181

G81

B41

Red181 (71%)

Green81 (31.8%)

Blue41 (16.1%)

Hue17.14°

Saturation (HSL)63.06%

Lightness43.53%

Dominant channelRed

Hex per channelR B5 · G 51 · B 29

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B55129 (chemical formula)

Formula
595,944.49 g/mol
55129 atoms

B55129 has a molar mass of 595,944.49 g/mol, made up of 55129 atoms across 1 element: 55129 × B.

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Molar mass

Molar mass595,944.49 g/mol

Total atoms per molecule55129

Distinct elements1

Mass of one molecule9.8958911 × 10^-19 g

Molecules per gram1.0105204 × 10^18

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 × 55129)595,944.49 g/mol, 100%

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Elements in this formula

Boron

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