Recognised as Colour
#B30015
- #B30015
- Red
- Dark
- Nearest: Firebrick
#B30015 is a red with RGB values 179, 0, 21 and HSL 353°, 100%, 35%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#B30015#B30015
HEX#B30015
RGBrgb(179, 0, 21)
RGB (0–1)0.702, 0, 0.0824
RGB percentages70.2%, 0%, 8.2%
HSLhsl(353, 100%, 35.1%)
HSV / HSBhsv(353, 100%, 70.2%)
CMYK0%, 100%, 88.3%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,730,965
CSS custom property--colour: #B30015;
Brightness & contrast
Relative luminance0.09638WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.17:1
Contrast with white7.17:1WCAG normal text: AAA
Contrast with black2.93:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#4CFFEA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.17:1WCAG large text: AAA
Contrast with black, large text2.93:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00B39E
Analogous#B3006F, #B34400
Triadic#15B300, #0015B3
Split complementary#00B344, #006FB3
Tetradic#6FB300, #00B39E, #4400B3
Tints, shades & saturation
Channel breakdown
R179
G0
B21
Red179 (70.2%)
Green0 (0%)
Blue21 (8.2%)
Hue352.96°
Saturation (HSL)100%
Lightness35.1%
Dominant channelRed
Hex per channelR B3 · G 00 · B 15
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Also reads as
B30015 (chemical formula)
- Formula
- 324,462.15 g/mol
- 30015 atoms
B30015 has a molar mass of 324,462.15 g/mol, made up of 30015 atoms across 1 element: 30015 × B.
Molar mass
Molar mass324,462.15 g/mol
Total atoms per molecule30015
Distinct elements1
Mass of one molecule5.3878208 × 10^-19 g
Molecules per gram1.856038 × 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 × 30015)324,462.15 g/mol, 100%
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