Recognised as Colour
#B4392B
- #B4392B
- Red
- Dark
- Nearest: Brown
#B4392B is a red with RGB values 180, 57, 43 and HSL 6°, 61%, 44%. 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
#B4392B#B4392B
HEX#B4392B
RGBrgb(180, 57, 43)
RGB (0–1)0.7059, 0.2235, 0.1686
RGB percentages70.6%, 22.4%, 16.9%
HSLhsl(6.1, 61.4%, 43.7%)
HSV / HSBhsv(6.1, 76.1%, 70.6%)
CMYK0%, 68.3%, 76.1%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,811,115
CSS custom property--colour: #B4392B;
Brightness & contrast
Relative luminance0.12804WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.9:1
Contrast with white5.9:1WCAG normal text: AA
Contrast with black3.56:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#4BC6D4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.9:1WCAG large text: AAA
Contrast with black, large text3.56:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2BA6B4
Analogous#B42B62, #B47E2B
Triadic#2BB439, #392BB4
Split complementary#2BB47E, #2B61B4
Tetradic#61B42B, #2BA6B4, #7D2BB4
Tints, shades & saturation
Channel breakdown
R180
G57
B43
Red180 (70.6%)
Green57 (22.4%)
Blue43 (16.9%)
Hue6.13°
Saturation (HSL)61.43%
Lightness43.73%
Dominant channelRed
Hex per channelR B4 · G 39 · B 2B
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Also reads as
B4392B (chemical formula)
- Formula
- 47,488.33 g/mol
- 4393 atoms
B4392B has a molar mass of 47,488.33 g/mol, made up of 4393 atoms across 1 element: 4393 × B.
Molar mass
Molar mass47,488.33 g/mol
Total atoms per molecule4393
Distinct elements1
Mass of one molecule7.8856227 × 10^-20 g
Molecules per gram1.2681307 × 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 × 4393)47,488.33 g/mol, 100%
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