Recognised as Colour
#B8021B
- #B8021B
- Red
- Dark
- Nearest: Firebrick
#B8021B is a red with RGB values 184, 2, 27 and HSL 352°, 98%, 36%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B8021B#B8021B
HEX#B8021B
RGBrgb(184, 2, 27)
RGB (0–1)0.7216, 0.0078, 0.1059
RGB percentages72.2%, 0.8%, 10.6%
HSLhsl(351.8, 97.8%, 36.5%)
HSV / HSBhsv(351.8, 98.9%, 72.2%)
CMYK0%, 98.9%, 85.3%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,059,163
CSS custom property--colour: #B8021B;
Brightness & contrast
Relative luminance0.10313WCAG 2.x, 0 is black and 1 is white
Perceived brightness101 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.86:1
Contrast with white6.86:1WCAG normal text: AA
Contrast with black3.06:1WCAG normal text: Fail
Greyscale equivalent#2A2A2A
Inverted#47FDE4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.86:1WCAG large text: AAA
Contrast with black, large text3.06:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#02B89F
Analogous#B80276, #B84402
Triadic#1BB802, #021BB8
Split complementary#02B844, #0276B8
Tetradic#76B802, #02B89F, #4402B8
Tints, shades & saturation
Channel breakdown
R184
G2
B27
Red184 (72.2%)
Green2 (0.8%)
Blue27 (10.6%)
Hue351.76°
Saturation (HSL)97.85%
Lightness36.47%
Dominant channelRed
Hex per channelR B8 · G 02 · B 1B
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Also reads as
B8021B (chemical formula)
- Formula
- 86,717.82 g/mol
- 8022 atoms
B8021B has a molar mass of 86,717.82 g/mol, made up of 8022 atoms across 1 element: 8022 × B.
Molar mass
Molar mass86,717.82 g/mol
Total atoms per molecule8022
Distinct elements1
Mass of one molecule1.4399833 × 10^-19 g
Molecules per gram6.9445251 × 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 × 8022)86,717.82 g/mol, 100%
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