Recognised as Colour
#B51232
- #B51232
- Red
- Dark
- Nearest: Firebrick
#B51232 is a red with RGB values 181, 18, 50 and HSL 348°, 82%, 39%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B51232#B51232
HEX#B51232
RGBrgb(181, 18, 50)
RGB (0–1)0.7098, 0.0706, 0.1961
RGB percentages71%, 7.1%, 19.6%
HSLhsl(348.2, 81.9%, 39%)
HSV / HSBhsv(348.2, 90.1%, 71%)
CMYK0%, 90.1%, 72.4%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,866,674
CSS custom property--colour: #B51232;
Brightness & contrast
Relative luminance0.10487WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.78:1
Contrast with white6.78:1WCAG normal text: AA
Contrast with black3.1:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#4AEDCD
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.78:1WCAG large text: AAA
Contrast with black, large text3.1:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#12B595
Analogous#B51284, #B54412
Triadic#32B512, #1232B5
Split complementary#12B544, #1284B5
Tetradic#84B512, #12B595, #4412B5
Tints, shades & saturation
Channel breakdown
R181
G18
B50
Red181 (71%)
Green18 (7.1%)
Blue50 (19.6%)
Hue348.22°
Saturation (HSL)81.91%
Lightness39.02%
Dominant channelRed
Hex per channelR B5 · G 12 · B 32
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Also reads as
B51232 (chemical formula)
- Formula
- 553,817.92 g/mol
- 51232 atoms
B51232 has a molar mass of 553,817.92 g/mol, made up of 51232 atoms across 1 element: 51232 × B.
Molar mass
Molar mass553,817.92 g/mol
Total atoms per molecule51232
Distinct elements1
Mass of one molecule9.1963629 × 10^-19 g
Molecules per gram1.0873864 × 10^18
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 × 51232)553,817.92 g/mol, 100%
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