Recognised as Colour
#BBAB21
- #BBAB21
- Yellow
- Dark
- Nearest: Goldenrod
#BBAB21 is a yellow with RGB values 187, 171, 33 and HSL 54°, 70%, 43%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Goldenrod.
Colour values
#BBAB21#BBAB21
HEX#BBAB21
RGBrgb(187, 171, 33)
RGB (0–1)0.7333, 0.6706, 0.1294
RGB percentages73.3%, 67.1%, 12.9%
HSLhsl(53.8, 70%, 43.1%)
HSV / HSBhsv(53.8, 82.4%, 73.3%)
CMYK0%, 8.6%, 82.4%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,299,041
CSS custom property--colour: #BBAB21;
Brightness & contrast
Relative luminance0.398WCAG 2.x, 0 is black and 1 is white
Perceived brightness166.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.96:1
Contrast with white2.34:1WCAG normal text: Fail
Contrast with black8.96:1WCAG normal text: AAA
Greyscale equivalent#A4A4A4
Inverted#4454DE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.34:1WCAG large text: Fail
Contrast with black, large text8.96:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2131BB
Analogous#BB5E21, #7EBB21
Triadic#21BBAB, #AB21BB
Split complementary#217EBB, #5E21BB
Tetradic#21BB5E, #2131BB, #BB217E
Tints, shades & saturation
Channel breakdown
R187
G171
B33
Red187 (73.3%)
Green171 (67.1%)
Blue33 (12.9%)
Hue53.77°
Saturation (HSL)70%
Lightness43.14%
Dominant channelRed
Hex per channelR BB · G AB · B 21
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Harmonies
Similar named colours
Also reads as
BBaB21 (chemical formula)
- Formula
- 375.15 g/mol
- 23 atoms
BBaB21 has a molar mass of 375.15 g/mol, made up of 23 atoms across 2 elements: 22 × B, 1 × Ba.
Molar mass
Molar mass375.15 g/mol
Total atoms per molecule23
Distinct elements2
Mass of one molecule6.2295123 × 10^-22 g
Molecules per gram1.6052621 × 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
B63.4%
Ba36.6%
Boron (B × 22)237.82 g/mol, 63.393%
Barium (Ba)137.33 g/mol, 36.607%
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