Recognised as Colour
#BB3215
- #BB3215
- Red
- Dark
- Nearest: Firebrick
#BB3215 is a red with RGB values 187, 50, 21 and HSL 10°, 80%, 41%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#BB3215#BB3215
HEX#BB3215
RGBrgb(187, 50, 21)
RGB (0–1)0.7333, 0.1961, 0.0824
RGB percentages73.3%, 19.6%, 8.2%
HSLhsl(10.5, 79.8%, 40.8%)
HSV / HSBhsv(10.5, 88.8%, 73.3%)
CMYK0%, 73.3%, 88.8%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,268,053
CSS custom property--colour: #BB3215;
Brightness & contrast
Relative luminance0.129WCAG 2.x, 0 is black and 1 is white
Perceived brightness109.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.87:1
Contrast with white5.87:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#44CDEA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.87:1WCAG large text: AAA
Contrast with black, large text3.58:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#159EBB
Analogous#BB154B, #BB8515
Triadic#15BB32, #3215BB
Split complementary#15BB85, #154BBB
Tetradic#4BBB15, #159EBB, #8515BB
Tints, shades & saturation
Channel breakdown
R187
G50
B21
Red187 (73.3%)
Green50 (19.6%)
Blue21 (8.2%)
Hue10.48°
Saturation (HSL)79.81%
Lightness40.78%
Dominant channelRed
Hex per channelR BB · G 32 · B 15
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Also reads as
BB3215 (chemical formula)
- Formula
- 34,764.96 g/mol
- 3216 atoms
BB3215 has a molar mass of 34,764.96 g/mol, made up of 3216 atoms across 1 element: 3216 × B.
Molar mass
Molar mass34,764.96 g/mol
Total atoms per molecule3216
Distinct elements1
Mass of one molecule5.7728574 × 10^-20 g
Molecules per gram1.7322444 × 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
B100%
Boron (B × 3216)34,764.96 g/mol, 100%
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