Recognised as Colour
#B55C28
- #B55C28
- Orange
- Dark
- Nearest: Sienna
#B55C28 is a orange with RGB values 181, 92, 40 and HSL 22°, 64%, 43%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Sienna.
Colour values
#B55C28#B55C28
HEX#B55C28
RGBrgb(181, 92, 40)
RGB (0–1)0.7098, 0.3608, 0.1569
RGB percentages71%, 36.1%, 15.7%
HSLhsl(22.1, 63.8%, 43.3%)
HSV / HSBhsv(22.1, 77.9%, 71%)
CMYK0%, 49.2%, 77.9%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,885,608
CSS custom property--colour: #B55C28;
Brightness & contrast
Relative luminance0.17631WCAG 2.x, 0 is black and 1 is white
Perceived brightness122.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.64:1
Contrast with white4.64:1WCAG normal text: AA
Contrast with black4.53:1WCAG normal text: AA
Greyscale equivalent#6B6B6B
Inverted#4AA3D7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.64:1WCAG large text: AAA
Contrast with black, large text4.53:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2881B5
Analogous#B5283A, #B5A328
Triadic#28B55C, #5C28B5
Split complementary#28B5A3, #283AB5
Tetradic#3AB528, #2881B5, #A328B5
Tints, shades & saturation
Channel breakdown
R181
G92
B40
Red181 (71%)
Green92 (36.1%)
Blue40 (15.7%)
Hue22.13°
Saturation (HSL)63.8%
Lightness43.33%
Dominant channelRed
Hex per channelR B5 · G 5C · B 28
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Also reads as
B55C28 (chemical formula)
- Formula
- 930.858 g/mol
- 83 atoms
B55C28 has a molar mass of 930.858 g/mol, made up of 83 atoms across 2 elements: 55 × B, 28 × C.
Molar mass
Molar mass930.858 g/mol
Total atoms per molecule83
Distinct elements2
Mass of one molecule1.5457261 × 10^-21 g
Molecules per gram6.4694516 × 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
B63.9%
C36.1%
Boron (B × 55)594.55 g/mol, 63.871%
Carbon (C × 28)336.308 g/mol, 36.129%
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