Recognised as Colour
#B45251
- #B45251
- Red
- Dark
- Nearest: Indian red
#B45251 is a red with RGB values 180, 82, 81 and HSL 1°, 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
#B45251#B45251
HEX#B45251
RGBrgb(180, 82, 81)
RGB (0–1)0.7059, 0.3216, 0.3176
RGB percentages70.6%, 32.2%, 31.8%
HSLhsl(0.6, 39.8%, 51.2%)
HSV / HSBhsv(0.6, 55%, 70.6%)
CMYK0%, 54.4%, 55%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,817,553
CSS custom property--colour: #B45251;
Brightness & contrast
Relative luminance0.16332WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.92:1
Contrast with white4.92:1WCAG normal text: AA
Contrast with black4.27:1WCAG normal text: Fail
Greyscale equivalent#676767
Inverted#4BADAE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.92:1WCAG large text: AAA
Contrast with black, large text4.27:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#51B3B4
Analogous#B45181, #B48451
Triadic#51B452, #5251B4
Split complementary#51B484, #5181B4
Tetradic#81B451, #51B3B4, #8451B4
Tints, shades & saturation
Channel breakdown
R180
G82
B81
Red180 (70.6%)
Green82 (32.2%)
Blue81 (31.8%)
Hue0.61°
Saturation (HSL)39.76%
Lightness51.18%
Dominant channelRed
Hex per channelR B4 · G 52 · B 51
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Harmonies
Similar named colours
Also reads as
B45251 (chemical formula)
- Formula
- 489,163.31 g/mol
- 45251 atoms
B45251 has a molar mass of 489,163.31 g/mol, made up of 45251 atoms across 1 element: 45251 × B.
Molar mass
Molar mass489,163.31 g/mol
Total atoms per molecule45251
Distinct elements1
Mass of one molecule8.1227479 × 10^-19 g
Molecules per gram1.2311105 × 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 × 45251)489,163.31 g/mol, 100%
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