Recognised as Decimal number
809
- Positive
- Decimal
- 0 d.p.
- Exact fraction
- 3 s.f.
809 is a decimal number equal to 809⁄1. It lies between 809 and 809, and as a percentage it is 80,900%.
Number properties
Fractions & ratios
Arithmetic
Representations
Decimal809
Scientific notation8.09 × 10^2
Exponential8.09e+2
IEEE 754 binary64 (hex)0x4089480000000000the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x444A400032-bit single precision, may lose accuracy
Rounding & precision
Significant figures as written3counted from the digits as typed, not from the value
To 0 decimal places809
To 1 decimal place809.0
To 2 decimal places809.00
To 3 decimal places809.000
To 4 decimal places809.0000
To 1 significant figure8e+2
To 2 significant figures8.1e+2
To 3 significant figures809
To 4 significant figures809.0
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Also reads as
#809E00 (colour)
- #809E00
- Green
- Dark
- Nearest: Olivedrab
#809E00 is a green with RGB values 128, 158, 0 and HSL 71°, 100%, 31%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Olivedrab.
Colour values
#809E00#809E00
HEX#809E00
RGBrgb(128, 158, 0)
RGB (0–1)0.502, 0.6196, 0
RGB percentages50.2%, 62%, 0%
HSLhsl(71.4, 100%, 31%)
HSV / HSBhsv(71.4, 100%, 62%)
CMYK19%, 0%, 100%, 38%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,429,056
CSS custom property--colour: #809E00;
Brightness & contrast
Relative luminance0.29043WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.81:1
Contrast with white3.08:1WCAG normal text: Fail
Contrast with black6.81:1WCAG normal text: AA
Greyscale equivalent#8C8C8C
Inverted#7F61FF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.08:1WCAG large text: AA
Contrast with black, large text6.81:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#1E009E
Analogous#9E6D00, #319E00
Triadic#00809E, #9E0080
Split complementary#00319E, #6D009E
Tetradic#009E6D, #1E009E, #9E0031
Tints, shades & saturation
Channel breakdown
R128
G158
B0
Red128 (50.2%)
Green158 (62%)
Blue0 (0%)
Hue71.39°
Saturation (HSL)100%
Lightness30.98%
Dominant channelGreen
Hex per channelR 80 · G 9E · B 00
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Harmonies
Similar named colours
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