Recognised as Colour
#BC3721
- #BC3721
- Red
- Dark
- Nearest: Firebrick
#BC3721 is a red with RGB values 188, 55, 33 and HSL 9°, 70%, 43%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#BC3721#BC3721
HEX#BC3721
RGBrgb(188, 55, 33)
RGB (0–1)0.7373, 0.2157, 0.1294
RGB percentages73.7%, 21.6%, 12.9%
HSLhsl(8.5, 70.1%, 43.3%)
HSV / HSBhsv(8.5, 82.4%, 73.7%)
CMYK0%, 70.7%, 82.4%, 26.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,334,881
CSS custom property--colour: #BC3721;
Brightness & contrast
Relative luminance0.13534WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.67:1
Contrast with white5.67:1WCAG normal text: AA
Contrast with black3.71:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#43C8DE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.67:1WCAG large text: AAA
Contrast with black, large text3.71:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#21A6BC
Analogous#BC2159, #BC8421
Triadic#21BC37, #3721BC
Split complementary#21BC84, #2159BC
Tetradic#59BC21, #21A6BC, #8421BC
Tints, shades & saturation
Channel breakdown
R188
G55
B33
Red188 (73.7%)
Green55 (21.6%)
Blue33 (12.9%)
Hue8.52°
Saturation (HSL)70.14%
Lightness43.33%
Dominant channelRed
Hex per channelR BC · G 37 · B 21
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Also reads as
BC3721 (chemical formula)
- Formula
- 44,703.741 g/mol
- 3722 atoms
BC3721 has a molar mass of 44,703.741 g/mol, made up of 3722 atoms across 2 elements: 1 × B, 3721 × C.
Molar mass
Molar mass44,703.741 g/mol
Total atoms per molecule3722
Distinct elements2
Mass of one molecule7.4232308 × 10^-20 g
Molecules per gram1.3471223 × 10^19
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
B0%
C100%
Boron (B)10.81 g/mol, 0.024%
Carbon (C × 3721)44,692.931 g/mol, 99.976%
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