Recognised as Colour
#B40510
- #B40510
- Red
- Dark
- Nearest: Firebrick
#B40510 is a red with RGB values 180, 5, 16 and HSL 356°, 95%, 36%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#B40510#B40510
HEX#B40510
RGBrgb(180, 5, 16)
RGB (0–1)0.7059, 0.0196, 0.0627
RGB percentages70.6%, 2%, 6.3%
HSLhsl(356.2, 94.6%, 36.3%)
HSV / HSBhsv(356.2, 97.2%, 70.6%)
CMYK0%, 97.2%, 91.1%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,797,776
CSS custom property--colour: #B40510;
Brightness & contrast
Relative luminance0.09849WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.07:1
Contrast with white7.07:1WCAG normal text: AAA
Contrast with black2.97:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#4BFAEF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.07:1WCAG large text: AAA
Contrast with black, large text2.97:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#05B4A9
Analogous#B40567, #B45205
Triadic#10B405, #0510B4
Split complementary#05B452, #0567B4
Tetradic#67B405, #05B4A9, #5205B4
Tints, shades & saturation
Channel breakdown
R180
G5
B16
Red180 (70.6%)
Green5 (2%)
Blue16 (6.3%)
Hue356.23°
Saturation (HSL)94.59%
Lightness36.27%
Dominant channelRed
Hex per channelR B4 · G 05 · B 10
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Also reads as
B40510 (chemical formula)
- Formula
- 437,913.1 g/mol
- 40510 atoms
B40510 has a molar mass of 437,913.1 g/mol, made up of 40510 atoms across 1 element: 40510 × B.
Molar mass
Molar mass437,913.1 g/mol
Total atoms per molecule40510
Distinct elements1
Mass of one molecule7.2717181 × 10^-19 g
Molecules per gram1.3751908 × 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 × 40510)437,913.1 g/mol, 100%
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