Recognised as Colour
#BF3939
- #BF3939
- Red
- Dark
- Nearest: Brown
#BF3939 is a red with RGB values 191, 57, 57 and HSL 0°, 54%, 49%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Brown.
Colour values
#BF3939#BF3939
HEX#BF3939
RGBrgb(191, 57, 57)
RGB (0–1)0.749, 0.2235, 0.2235
RGB percentages74.9%, 22.4%, 22.4%
HSLhsl(0, 54%, 48.6%)
HSV / HSBhsv(0, 70.2%, 74.9%)
CMYK0%, 70.2%, 70.2%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,532,025
CSS custom property--colour: #BF3939;
Brightness & contrast
Relative luminance0.14298WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.44:1
Contrast with white5.44:1WCAG normal text: AA
Contrast with black3.86:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#40C6C6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.44:1WCAG large text: AAA
Contrast with black, large text3.86:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#39BFBF
Analogous#BF397C, #BF7C39
Triadic#39BF39, #3939BF
Split complementary#39BF7C, #397CBF
Tetradic#7CBF39, #39BFBF, #7C39BF
Tints, shades & saturation
Channel breakdown
R191
G57
B57
Red191 (74.9%)
Green57 (22.4%)
Blue57 (22.4%)
Hue0°
Saturation (HSL)54.03%
Lightness48.63%
Dominant channelRed
Hex per channelR BF · G 39 · B 39
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Also reads as
BF3939 (chemical formula)
- Formula
- 74,843.932 g/mol
- 3940 atoms
BF3939 has a molar mass of 74,843.932 g/mol, made up of 3940 atoms across 2 elements: 1 × B, 3939 × F.
Molar mass
Molar mass74,843.932 g/mol
Total atoms per molecule3940
Distinct elements2
Mass of one molecule1.2428127 × 10^-19 g
Molecules per gram8.0462645 × 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
B0%
F100%
Boron (B)10.81 g/mol, 0.014%
Fluorine (F × 3939)74,833.122 g/mol, 99.986%
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