Recognised as Colour
#B33939
- #B33939
- Red
- Dark
- Nearest: Brown
#B33939 is a red with RGB values 179, 57, 57 and HSL 0°, 52%, 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
#B33939#B33939
HEX#B33939
RGBrgb(179, 57, 57)
RGB (0–1)0.702, 0.2235, 0.2235
RGB percentages70.2%, 22.4%, 22.4%
HSLhsl(0, 51.7%, 46.3%)
HSV / HSBhsv(0, 68.2%, 70.2%)
CMYK0%, 68.2%, 68.2%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,745,593
CSS custom property--colour: #B33939;
Brightness & contrast
Relative luminance0.12805WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.9 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#535353
Inverted#4CC6C6
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#39B3B3
Analogous#B33976, #B37639
Triadic#39B339, #3939B3
Split complementary#39B376, #3976B3
Tetradic#76B339, #39B3B3, #7639B3
Tints, shades & saturation
Channel breakdown
R179
G57
B57
Red179 (70.2%)
Green57 (22.4%)
Blue57 (22.4%)
Hue0°
Saturation (HSL)51.69%
Lightness46.27%
Dominant channelRed
Hex per channelR B3 · G 39 · B 39
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Also reads as
B33939 (chemical formula)
- Formula
- 366,880.59 g/mol
- 33939 atoms
B33939 has a molar mass of 366,880.59 g/mol, made up of 33939 atoms across 1 element: 33939 × B.
Molar mass
Molar mass366,880.59 g/mol
Total atoms per molecule33939
Distinct elements1
Mass of one molecule6.0921955 × 10^-19 g
Molecules per gram1.6414444 × 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 × 33939)366,880.59 g/mol, 100%
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