Recognised as Colour
#BFBE21
- #BFBE21
- Yellow
- Dark
- Nearest: Yellow green
#BFBE21 is a yellow with RGB values 191, 190, 33 and HSL 60°, 71%, 44%. It is a dark colour, so black text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Yellow green.
Colour values
#BFBE21#BFBE21
HEX#BFBE21
RGBrgb(191, 190, 33)
RGB (0–1)0.749, 0.7451, 0.1294
RGB percentages74.9%, 74.5%, 12.9%
HSLhsl(59.6, 70.5%, 43.9%)
HSV / HSBhsv(59.6, 82.7%, 74.9%)
CMYK0%, 0.5%, 82.7%, 25.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,566,049
CSS custom property--colour: #BFBE21;
Brightness & contrast
Relative luminance0.48013WCAG 2.x, 0 is black and 1 is white
Perceived brightness179.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.6:1
Contrast with white1.98:1WCAG normal text: Fail
Contrast with black10.6:1WCAG normal text: AAA
Greyscale equivalent#B3B3B3
Inverted#4041DE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.98:1WCAG large text: Fail
Contrast with black, large text10.6:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2122BF
Analogous#BF6F21, #71BF21
Triadic#21BFBE, #BE21BF
Split complementary#2171BF, #6F21BF
Tetradic#21BF6F, #2122BF, #BF2171
Tints, shades & saturation
Channel breakdown
R191
G190
B33
Red191 (74.9%)
Green190 (74.5%)
Blue33 (12.9%)
Hue59.62°
Saturation (HSL)70.54%
Lightness43.92%
Dominant channelRed
Hex per channelR BF · G BE · B 21
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Also reads as
BFBe21 (chemical formula)
- Formula
- 219.0642 g/mol
- 23 atoms
BFBe21 has a molar mass of 219.0642 g/mol, made up of 23 atoms across 3 elements: 1 × B, 1 × F, 21 × Be.
Molar mass
Molar mass219.0642 g/mol
Total atoms per molecule23
Distinct elements3
Mass of one molecule3.6376466 × 10^-22 g
Molecules per gram2.7490301 × 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
B4.9%
F8.7%
Be86.4%
Boron (B)10.81 g/mol, 4.935%
Fluorine (F)18.998 g/mol, 8.672%
Beryllium (Be × 21)189.2562 g/mol, 86.393%
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