Recognised as Colour
#B5092B
- #B5092B
- Red
- Dark
- Nearest: Firebrick
#B5092B is a red with RGB values 181, 9, 43 and HSL 348°, 91%, 37%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B5092B#B5092B
HEX#B5092B
RGBrgb(181, 9, 43)
RGB (0–1)0.7098, 0.0353, 0.1686
RGB percentages71%, 3.5%, 16.9%
HSLhsl(348.1, 90.5%, 37.3%)
HSV / HSBhsv(348.1, 95%, 71%)
CMYK0%, 95%, 76.2%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,864,363
CSS custom property--colour: #B5092B;
Brightness & contrast
Relative luminance0.10194WCAG 2.x, 0 is black and 1 is white
Perceived brightness100.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.91:1
Contrast with white6.91:1WCAG normal text: AA
Contrast with black3.04:1WCAG normal text: Fail
Greyscale equivalent#303030
Inverted#4AF6D4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.91:1WCAG large text: AAA
Contrast with black, large text3.04:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#09B593
Analogous#B50981, #B53D09
Triadic#2BB509, #092BB5
Split complementary#09B53D, #0981B5
Tetradic#81B509, #09B593, #3D09B5
Tints, shades & saturation
Channel breakdown
R181
G9
B43
Red181 (71%)
Green9 (3.5%)
Blue43 (16.9%)
Hue348.14°
Saturation (HSL)90.53%
Lightness37.25%
Dominant channelRed
Hex per channelR B5 · G 09 · B 2B
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Also reads as
B5092B (chemical formula)
- Formula
- 55,055.33 g/mol
- 5093 atoms
B5092B has a molar mass of 55,055.33 g/mol, made up of 5093 atoms across 1 element: 5093 × B.
Molar mass
Molar mass55,055.33 g/mol
Total atoms per molecule5093
Distinct elements1
Mass of one molecule9.1421526 × 10^-20 g
Molecules per gram1.0938343 × 10^19
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 × 5093)55,055.33 g/mol, 100%
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