Recognised as Colour
#B1857B
- #B1857B
- Red
- Dark
- Nearest: Rosy brown
#B1857B is a red with RGB values 177, 133, 123 and HSL 11°, 26%, 59%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Rosy brown.
Colour values
#B1857B#B1857B
HEX#B1857B
RGBrgb(177, 133, 123)
RGB (0–1)0.6941, 0.5216, 0.4824
RGB percentages69.4%, 52.2%, 48.2%
HSLhsl(11.1, 25.7%, 58.8%)
HSV / HSBhsv(11.1, 30.5%, 69.4%)
CMYK0%, 24.9%, 30.5%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,634,043
CSS custom property--colour: #B1857B;
Brightness & contrast
Relative luminance0.27552WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.51:1
Contrast with white3.23:1WCAG normal text: Fail
Contrast with black6.51:1WCAG normal text: AA
Greyscale equivalent#8E8E8E
Inverted#4E7A84
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.23:1WCAG large text: AA
Contrast with black, large text6.51:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#7BA7B1
Analogous#B17B8C, #B1A07B
Triadic#7BB185, #857BB1
Split complementary#7BB1A0, #7B8CB1
Tetradic#8CB17B, #7BA7B1, #A07BB1
Tints, shades & saturation
Channel breakdown
R177
G133
B123
Red177 (69.4%)
Green133 (52.2%)
Blue123 (48.2%)
Hue11.11°
Saturation (HSL)25.71%
Lightness58.82%
Dominant channelRed
Hex per channelR B1 · G 85 · B 7B
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Also reads as
B1857B (chemical formula)
- Formula
- 20,084.98 g/mol
- 1858 atoms
B1857B has a molar mass of 20,084.98 g/mol, made up of 1858 atoms across 1 element: 1858 × B.
Molar mass
Molar mass20,084.98 g/mol
Total atoms per molecule1858
Distinct elements1
Mass of one molecule3.3351894 × 10^-20 g
Molecules per gram2.9983305 × 10^19
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
B100%
Boron (B × 1858)20,084.98 g/mol, 100%
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