Recognised as Colour
#BB4028
- #BB4028
- Red
- Dark
- Nearest: Firebrick
#BB4028 is a red with RGB values 187, 64, 40 and HSL 10°, 65%, 45%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#BB4028#BB4028
HEX#BB4028
RGBrgb(187, 64, 40)
RGB (0–1)0.7333, 0.251, 0.1569
RGB percentages73.3%, 25.1%, 15.7%
HSLhsl(9.8, 64.8%, 44.5%)
HSV / HSBhsv(9.8, 78.6%, 73.3%)
CMYK0%, 65.8%, 78.6%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,271,656
CSS custom property--colour: #BB4028;
Brightness & contrast
Relative luminance0.14385WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.42:1
Contrast with white5.42:1WCAG normal text: AA
Contrast with black3.88:1WCAG normal text: Fail
Greyscale equivalent#585858
Inverted#44BFD7
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.42:1WCAG large text: AAA
Contrast with black, large text3.88:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#28A3BB
Analogous#BB2859, #BB8928
Triadic#28BB40, #4028BB
Split complementary#28BB8A, #2859BB
Tetradic#5ABB28, #28A3BB, #8A28BB
Tints, shades & saturation
Channel breakdown
R187
G64
B40
Red187 (73.3%)
Green64 (25.1%)
Blue40 (15.7%)
Hue9.8°
Saturation (HSL)64.76%
Lightness44.51%
Dominant channelRed
Hex per channelR BB · G 40 · B 28
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Also reads as
BB4028 (chemical formula)
- Formula
- 43,553.49 g/mol
- 4029 atoms
BB4028 has a molar mass of 43,553.49 g/mol, made up of 4029 atoms across 1 element: 4029 × B.
Molar mass
Molar mass43,553.49 g/mol
Total atoms per molecule4029
Distinct elements1
Mass of one molecule7.2322272 × 10^-20 g
Molecules per gram1.3826999 × 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 × 4029)43,553.49 g/mol, 100%
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