Recognised as Colour
#B31408
- #B31408
- Red
- Dark
- Nearest: Firebrick
#B31408 is a red with RGB values 179, 20, 8 and HSL 4°, 91%, 37%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B31408#B31408
HEX#B31408
RGBrgb(179, 20, 8)
RGB (0–1)0.702, 0.0784, 0.0314
RGB percentages70.2%, 7.8%, 3.1%
HSLhsl(4.2, 91.4%, 36.7%)
HSV / HSBhsv(4.2, 95.5%, 70.2%)
CMYK0%, 88.8%, 95.5%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,736,072
CSS custom property--colour: #B31408;
Brightness & contrast
Relative luminance0.10102WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.95:1
Contrast with white6.95:1WCAG normal text: AA
Contrast with black3.02:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#4CEBF7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.95:1WCAG large text: AAA
Contrast with black, large text3.02:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#08A7B3
Analogous#B30851, #B36A08
Triadic#08B314, #1408B3
Split complementary#08B36A, #0851B3
Tetradic#52B308, #08A7B3, #6A08B3
Tints, shades & saturation
Channel breakdown
R179
G20
B8
Red179 (70.2%)
Green20 (7.8%)
Blue8 (3.1%)
Hue4.21°
Saturation (HSL)91.44%
Lightness36.67%
Dominant channelRed
Hex per channelR B3 · G 14 · B 08
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Also reads as
B31408 (chemical formula)
- Formula
- 339,520.48 g/mol
- 31408 atoms
B31408 has a molar mass of 339,520.48 g/mol, made up of 31408 atoms across 1 element: 31408 × B.
Molar mass
Molar mass339,520.48 g/mol
Total atoms per molecule31408
Distinct elements1
Mass of one molecule5.6378702 × 10^-19 g
Molecules per gram1.7737194 × 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 × 31408)339,520.48 g/mol, 100%
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