Recognised as Colour
#B45451
- #B45451
- Red
- Dark
- Nearest: Indian red
#B45451 is a red with RGB values 180, 84, 81 and HSL 2°, 40%, 51%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Indian red.
Colour values
#B45451#B45451
HEX#B45451
RGBrgb(180, 84, 81)
RGB (0–1)0.7059, 0.3294, 0.3176
RGB percentages70.6%, 32.9%, 31.8%
HSLhsl(1.8, 39.8%, 51.2%)
HSV / HSBhsv(1.8, 55%, 70.6%)
CMYK0%, 53.3%, 55%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,818,065
CSS custom property--colour: #B45451;
Brightness & contrast
Relative luminance0.16638WCAG 2.x, 0 is black and 1 is white
Perceived brightness120.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.85:1
Contrast with white4.85:1WCAG normal text: AA
Contrast with black4.33:1WCAG normal text: Fail
Greyscale equivalent#686868
Inverted#4BABAE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.85:1WCAG large text: AAA
Contrast with black, large text4.33:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#51B1B4
Analogous#B45180, #B48551
Triadic#51B454, #5451B4
Split complementary#51B485, #5180B4
Tetradic#80B451, #51B1B4, #8551B4
Tints, shades & saturation
Channel breakdown
R180
G84
B81
Red180 (70.6%)
Green84 (32.9%)
Blue81 (31.8%)
Hue1.82°
Saturation (HSL)39.76%
Lightness51.18%
Dominant channelRed
Hex per channelR B4 · G 54 · B 51
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Harmonies
Similar named colours
Also reads as
B45451 (chemical formula)
- Formula
- 491,325.31 g/mol
- 45451 atoms
B45451 has a molar mass of 491,325.31 g/mol, made up of 45451 atoms across 1 element: 45451 × B.
Molar mass
Molar mass491,325.31 g/mol
Total atoms per molecule45451
Distinct elements1
Mass of one molecule8.1586487 × 10^-19 g
Molecules per gram1.2256932 × 10^18
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 × 45451)491,325.31 g/mol, 100%
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