Recognised as Colour
#BFBF39
- #BFBF39
- Yellow
- Dark
- Nearest: Yellow green
#BFBF39 is a yellow with RGB values 191, 191, 57 and HSL 60°, 54%, 49%. It is a dark colour, so black text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Yellow green.
Colour values
#BFBF39#BFBF39
HEX#BFBF39
RGBrgb(191, 191, 57)
RGB (0–1)0.749, 0.749, 0.2235
RGB percentages74.9%, 74.9%, 22.4%
HSLhsl(60, 54%, 48.6%)
HSV / HSBhsv(60, 70.2%, 74.9%)
CMYK0%, 0%, 70.2%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,566,329
CSS custom property--colour: #BFBF39;
Brightness & contrast
Relative luminance0.48633WCAG 2.x, 0 is black and 1 is white
Perceived brightness180.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.73:1
Contrast with white1.96:1WCAG normal text: Fail
Contrast with black10.73:1WCAG normal text: AAA
Greyscale equivalent#B5B5B5
Inverted#4040C6
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.96:1WCAG large text: Fail
Contrast with black, large text10.73:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3939BF
Analogous#BF7C39, #7CBF39
Triadic#39BFBF, #BF39BF
Split complementary#397CBF, #7C39BF
Tetradic#39BF7C, #3939BF, #BF397C
Tints, shades & saturation
Channel breakdown
R191
G191
B57
Red191 (74.9%)
Green191 (74.9%)
Blue57 (22.4%)
Hue60°
Saturation (HSL)54.03%
Lightness48.63%
Dominant channelRed and Green
Hex per channelR BF · G BF · B 39
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Also reads as
BFBF39 (chemical formula)
- Formula
- 781.54 g/mol
- 42 atoms
BFBF39 has a molar mass of 781.54 g/mol, made up of 42 atoms across 2 elements: 2 × B, 40 × F.
Molar mass
Molar mass781.54 g/mol
Total atoms per molecule42
Distinct elements2
Mass of one molecule1.2977777 × 10^-21 g
Molecules per gram7.7054799 × 10^20
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
B2.8%
F97.2%
Boron (B × 2)21.62 g/mol, 2.766%
Fluorine (F × 40)759.92 g/mol, 97.234%
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