Recognised as Colour
#B81018
- #B81018
- Red
- Dark
- Nearest: Firebrick
#B81018 is a red with RGB values 184, 16, 24 and HSL 357°, 84%, 39%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B81018#B81018
HEX#B81018
RGBrgb(184, 16, 24)
RGB (0–1)0.7216, 0.0627, 0.0941
RGB percentages72.2%, 6.3%, 9.4%
HSLhsl(357.1, 84%, 39.2%)
HSV / HSBhsv(357.1, 91.3%, 72.2%)
CMYK0%, 91.3%, 87%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,062,744
CSS custom property--colour: #B81018;
Brightness & contrast
Relative luminance0.10627WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.72:1
Contrast with white6.72:1WCAG normal text: AA
Contrast with black3.13:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#47EFE7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.72:1WCAG large text: AAA
Contrast with black, large text3.13:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#10B8B0
Analogous#B8106C, #B85C10
Triadic#18B810, #1018B8
Split complementary#10B85C, #106CB8
Tetradic#6CB810, #10B8B0, #5C10B8
Tints, shades & saturation
Channel breakdown
R184
G16
B24
Red184 (72.2%)
Green16 (6.3%)
Blue24 (9.4%)
Hue357.14°
Saturation (HSL)84%
Lightness39.22%
Dominant channelRed
Hex per channelR B8 · G 10 · B 18
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Also reads as
B81018 (chemical formula)
- Formula
- 875,804.58 g/mol
- 81018 atoms
B81018 has a molar mass of 875,804.58 g/mol, made up of 81018 atoms across 1 element: 81018 × B.
Molar mass
Molar mass875,804.58 g/mol
Total atoms per molecule81018
Distinct elements1
Mass of one molecule1.4543077 × 10^-18 g
Molecules per gram6.8761238 × 10^17
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 × 81018)875,804.58 g/mol, 100%
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