Recognised as Colour
#B43937
- #B43937
- Red
- Dark
- Nearest: Brown
#B43937 is a red with RGB values 180, 57, 55 and HSL 1°, 53%, 46%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Brown.
Colour values
#B43937#B43937
HEX#B43937
RGBrgb(180, 57, 55)
RGB (0–1)0.7059, 0.2235, 0.2157
RGB percentages70.6%, 22.4%, 21.6%
HSLhsl(1, 53.2%, 46.1%)
HSV / HSBhsv(1, 69.4%, 70.6%)
CMYK0%, 68.3%, 69.4%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,811,127
CSS custom property--colour: #B43937;
Brightness & contrast
Relative luminance0.12905WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.86:1
Contrast with white5.86:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#4BC6C8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.86:1WCAG large text: AAA
Contrast with black, large text3.58:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#37B2B4
Analogous#B43773, #B47737
Triadic#37B439, #3937B4
Split complementary#37B478, #3773B4
Tetradic#74B437, #37B2B4, #7837B4
Tints, shades & saturation
Channel breakdown
R180
G57
B55
Red180 (70.6%)
Green57 (22.4%)
Blue55 (21.6%)
Hue0.96°
Saturation (HSL)53.19%
Lightness46.08%
Dominant channelRed
Hex per channelR B4 · G 39 · B 37
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Also reads as
B43937 (chemical formula)
- Formula
- 474,958.97 g/mol
- 43937 atoms
B43937 has a molar mass of 474,958.97 g/mol, made up of 43937 atoms across 1 element: 43937 × B.
Molar mass
Molar mass474,958.97 g/mol
Total atoms per molecule43937
Distinct elements1
Mass of one molecule7.8868792 × 10^-19 g
Molecules per gram1.2679286 × 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 × 43937)474,958.97 g/mol, 100%
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