Recognised as Colour
#BB1023
- #BB1023
- Red
- Dark
- Nearest: Firebrick
#BB1023 is a red with RGB values 187, 16, 35 and HSL 353°, 84%, 40%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#BB1023#BB1023
HEX#BB1023
RGBrgb(187, 16, 35)
RGB (0–1)0.7333, 0.0627, 0.1373
RGB percentages73.3%, 6.3%, 13.7%
HSLhsl(353.3, 84.2%, 39.8%)
HSV / HSBhsv(353.3, 91.4%, 73.3%)
CMYK0%, 91.4%, 81.3%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,259,363
CSS custom property--colour: #BB1023;
Brightness & contrast
Relative luminance0.11057WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.54:1
Contrast with white6.54:1WCAG normal text: AA
Contrast with black3.21:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#44EFDC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.54:1WCAG large text: AAA
Contrast with black, large text3.21:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#10BBA8
Analogous#BB1079, #BB5210
Triadic#23BB10, #1023BB
Split complementary#10BB52, #1079BB
Tetradic#79BB10, #10BBA8, #5210BB
Tints, shades & saturation
Channel breakdown
R187
G16
B35
Red187 (73.3%)
Green16 (6.3%)
Blue35 (13.7%)
Hue353.33°
Saturation (HSL)84.24%
Lightness39.8%
Dominant channelRed
Hex per channelR BB · G 10 · B 23
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Also reads as
BB1023 (chemical formula)
- Formula
- 11,069.44 g/mol
- 1024 atoms
BB1023 has a molar mass of 11,069.44 g/mol, made up of 1024 atoms across 1 element: 1024 × B.
Molar mass
Molar mass11,069.44 g/mol
Total atoms per molecule1024
Distinct elements1
Mass of one molecule1.8381238 × 10^-20 g
Molecules per gram5.4403301 × 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 × 1024)11,069.44 g/mol, 100%
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