Recognised as Colour
#BB4840
- #BB4840
- Red
- Dark
- Nearest: Brown
#BB4840 is a red with RGB values 187, 72, 64 and HSL 4°, 49%, 49%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Brown.
Colour values
#BB4840#BB4840
HEX#BB4840
RGBrgb(187, 72, 64)
RGB (0–1)0.7333, 0.2824, 0.251
RGB percentages73.3%, 28.2%, 25.1%
HSLhsl(3.9, 49%, 49.2%)
HSV / HSBhsv(3.9, 65.8%, 73.3%)
CMYK0%, 61.5%, 65.8%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer12,273,728
CSS custom property--colour: #BB4840;
Brightness & contrast
Relative luminance0.1557WCAG 2.x, 0 is black and 1 is white
Perceived brightness118.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.1:1
Contrast with white5.1:1WCAG normal text: AA
Contrast with black4.11:1WCAG normal text: Fail
Greyscale equivalent#606060
Inverted#44B7BF
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.1:1WCAG large text: AAA
Contrast with black, large text4.11:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#40B3BB
Analogous#BB4076, #BB8540
Triadic#40BB48, #4840BB
Split complementary#40BB85, #4076BB
Tetradic#76BB40, #40B3BB, #8540BB
Tints, shades & saturation
Channel breakdown
R187
G72
B64
Red187 (73.3%)
Green72 (28.2%)
Blue64 (25.1%)
Hue3.9°
Saturation (HSL)49%
Lightness49.22%
Dominant channelRed
Hex per channelR BB · G 48 · B 40
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Also reads as
BB4840 (chemical formula)
- Formula
- 52,331.21 g/mol
- 4841 atoms
BB4840 has a molar mass of 52,331.21 g/mol, made up of 4841 atoms across 1 element: 4841 × B.
Molar mass
Molar mass52,331.21 g/mol
Total atoms per molecule4841
Distinct elements1
Mass of one molecule8.6898019 × 10^-20 g
Molecules per gram1.1507742 × 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 × 4841)52,331.21 g/mol, 100%
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