Recognised as Colour
#B57C8B
- #B57C8B
- Red
- Dark
- Nearest: Rosy brown
#B57C8B is a red with RGB values 181, 124, 139 and HSL 344°, 28%, 60%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Rosy brown.
Colour values
#B57C8B#B57C8B
HEX#B57C8B
RGBrgb(181, 124, 139)
RGB (0–1)0.7098, 0.4863, 0.5451
RGB percentages71%, 48.6%, 54.5%
HSLhsl(344.2, 27.8%, 59.8%)
HSV / HSBhsv(344.2, 31.5%, 71%)
CMYK0%, 31.5%, 23.2%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,893,899
CSS custom property--colour: #B57C8B;
Brightness & contrast
Relative luminance0.26103WCAG 2.x, 0 is black and 1 is white
Perceived brightness145 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.22:1
Contrast with white3.38:1WCAG normal text: Fail
Contrast with black6.22:1WCAG normal text: AA
Greyscale equivalent#898989
Inverted#4A8374
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.38:1WCAG large text: AA
Contrast with black, large text6.22:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#7CB5A6
Analogous#B57CA7, #B58A7C
Triadic#8BB57C, #7C8BB5
Split complementary#7CB58A, #7CA7B5
Tetradic#A7B57C, #7CB5A6, #8A7CB5
Tints, shades & saturation
Channel breakdown
R181
G124
B139
Red181 (71%)
Green124 (48.6%)
Blue139 (54.5%)
Hue344.21°
Saturation (HSL)27.8%
Lightness59.8%
Dominant channelRed
Hex per channelR B5 · G 7C · B 8B
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Harmonies
Similar named colours
Also reads as
B57C8B (chemical formula)
- Formula
- 723.068 g/mol
- 66 atoms
B57C8B has a molar mass of 723.068 g/mol, made up of 66 atoms across 2 elements: 58 × B, 8 × C.
Molar mass
Molar mass723.068 g/mol
Total atoms per molecule66
Distinct elements2
Mass of one molecule1.2006827 × 10^-21 g
Molecules per gram8.3285953 × 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
B86.7%
C13.3%
Boron (B × 58)626.98 g/mol, 86.711%
Carbon (C × 8)96.088 g/mol, 13.289%
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