Recognised as Colour
#B22838
- #B22838
- Red
- Dark
- Nearest: Brown
#B22838 is a red with RGB values 178, 40, 56 and HSL 353°, 63%, 43%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Brown.
Colour values
#B22838#B22838
HEX#B22838
RGBrgb(178, 40, 56)
RGB (0–1)0.698, 0.1569, 0.2196
RGB percentages69.8%, 15.7%, 22%
HSLhsl(353, 63.3%, 42.7%)
HSV / HSBhsv(353, 77.5%, 69.8%)
CMYK0%, 77.5%, 68.5%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,675,704
CSS custom property--colour: #B22838;
Brightness & contrast
Relative luminance0.11268WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.45:1
Contrast with white6.45:1WCAG normal text: AA
Contrast with black3.25:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#4DD7C7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.45:1WCAG large text: AAA
Contrast with black, large text3.25:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#28B2A2
Analogous#B2287D, #B25D28
Triadic#38B228, #2838B2
Split complementary#28B25D, #287DB2
Tetradic#7DB228, #28B2A2, #5D28B2
Tints, shades & saturation
Channel breakdown
R178
G40
B56
Red178 (69.8%)
Green40 (15.7%)
Blue56 (22%)
Hue353.04°
Saturation (HSL)63.3%
Lightness42.75%
Dominant channelRed
Hex per channelR B2 · G 28 · B 38
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Also reads as
B22838 (chemical formula)
- Formula
- 246,878.78 g/mol
- 22838 atoms
B22838 has a molar mass of 246,878.78 g/mol, made up of 22838 atoms across 1 element: 22838 × B.
Molar mass
Molar mass246,878.78 g/mol
Total atoms per molecule22838
Distinct elements1
Mass of one molecule4.0995186 × 10^-19 g
Molecules per gram2.4393108 × 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 × 22838)246,878.78 g/mol, 100%
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