Recognised as Colour
#B33B2C
- #B33B2C
- Red
- Dark
- Nearest: Brown
#B33B2C is a red with RGB values 179, 59, 44 and HSL 7°, 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
#B33B2C#B33B2C
HEX#B33B2C
RGBrgb(179, 59, 44)
RGB (0–1)0.702, 0.2314, 0.1725
RGB percentages70.2%, 23.1%, 17.3%
HSLhsl(6.7, 60.5%, 43.7%)
HSV / HSBhsv(6.7, 75.4%, 70.2%)
CMYK0%, 67%, 75.4%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,746,092
CSS custom property--colour: #B33B2C;
Brightness & contrast
Relative luminance0.12893WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.87:1
Contrast with white5.87:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#535353
Inverted#4CC4D3
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.87:1WCAG 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#2CA4B3
Analogous#B32C60, #B37F2C
Triadic#2CB33B, #3B2CB3
Split complementary#2CB37E, #2C61B3
Tetradic#60B32C, #2CA4B3, #7F2CB3
Tints, shades & saturation
Channel breakdown
R179
G59
B44
Red179 (70.2%)
Green59 (23.1%)
Blue44 (17.3%)
Hue6.67°
Saturation (HSL)60.54%
Lightness43.73%
Dominant channelRed
Hex per channelR B3 · G 3B · B 2C
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Also reads as
B33B2C (chemical formula)
- Formula
- 390.361 g/mol
- 36 atoms
B33B2C has a molar mass of 390.361 g/mol, made up of 36 atoms across 2 elements: 35 × B, 1 × C.
Molar mass
Molar mass390.361 g/mol
Total atoms per molecule36
Distinct elements2
Mass of one molecule6.4820969 × 10^-22 g
Molecules per gram1.5427107 × 10^21
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
B96.9%
C3.1%
Boron (B × 35)378.35 g/mol, 96.923%
Carbon (C)12.011 g/mol, 3.077%
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