Recognised as Colour
#B1BF40
- #B1BF40
- Yellow
- Dark
- Nearest: Yellow green
#B1BF40 is a yellow with RGB values 177, 191, 64 and HSL 67°, 50%, 50%. It is a dark colour, so black text on it reaches 10.4:1 contrast (AAA for normal text). The nearest named colour is Yellow green.
Colour values
#B1BF40#B1BF40
HEX#B1BF40
RGBrgb(177, 191, 64)
RGB (0–1)0.6941, 0.749, 0.251
RGB percentages69.4%, 74.9%, 25.1%
HSLhsl(66.6, 49.8%, 50%)
HSV / HSBhsv(66.6, 66.5%, 74.9%)
CMYK7.3%, 0%, 66.5%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,648,832
CSS custom property--colour: #B1BF40;
Brightness & contrast
Relative luminance0.46979WCAG 2.x, 0 is black and 1 is white
Perceived brightness176.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.4:1
Contrast with white2.02:1WCAG normal text: Fail
Contrast with black10.4:1WCAG normal text: AAA
Greyscale equivalent#B3B3B3
Inverted#4E40BF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.02:1WCAG large text: Fail
Contrast with black, large text10.4:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#4E40BF
Analogous#BF8D40, #72BF40
Triadic#40B1BF, #BF40B1
Split complementary#4072BF, #8D40BF
Tetradic#40BF8D, #4E40BF, #BF4072
Tints, shades & saturation
Channel breakdown
R177
G191
B64
Red177 (69.4%)
Green191 (74.9%)
Blue64 (25.1%)
Hue66.61°
Saturation (HSL)49.8%
Lightness50%
Dominant channelGreen
Hex per channelR B1 · G BF · B 40
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Harmonies
Similar named colours
Also reads as
B1BF40 (chemical formula)
- Formula
- 781.54 g/mol
- 42 atoms
B1BF40 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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