Recognised as Decimal number
511
- Positive
- Decimal
- 0 d.p.
- Exact fraction
- 3 s.f.
511 is a decimal number equal to 511⁄1. It lies between 511 and 511, and as a percentage it is 51,100%.
Number properties
Fractions & ratios
Arithmetic
Representations
Decimal511
Scientific notation5.11 × 10^2
Exponential5.11e+2
IEEE 754 binary64 (hex)0x407FF00000000000the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x43FF800032-bit single precision, may lose accuracy
Rounding & precision
Significant figures as written3counted from the digits as typed, not from the value
To 0 decimal places511
To 1 decimal place511.0
To 2 decimal places511.00
To 3 decimal places511.000
To 4 decimal places511.0000
To 1 significant figure5e+2
To 2 significant figures5.1e+2
To 3 significant figures511
To 4 significant figures511.0
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Also reads as
#511E00 (colour)
- #511E00
- Orange
- Dark
- Nearest: Saddle brown
#511E00 is a orange with RGB values 81, 30, 0 and HSL 22°, 100%, 16%. It is a dark colour, so white text on it reaches 13.7:1 contrast (AAA for normal text). The nearest named colour is Saddle brown.
Colour values
#511E00#511E00
HEX#511E00
RGBrgb(81, 30, 0)
RGB (0–1)0.3176, 0.1176, 0
RGB percentages31.8%, 11.8%, 0%
HSLhsl(22.2, 100%, 15.9%)
HSV / HSBhsv(22.2, 100%, 31.8%)
CMYK0%, 63%, 100%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,316,096
CSS custom property--colour: #511E00;
Brightness & contrast
Relative luminance0.02678WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.68:1
Contrast with white13.68:1WCAG normal text: AAA
Contrast with black1.54:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#AEE1FF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.68:1WCAG large text: AAA
Contrast with black, large text1.54:1WCAG large text: Fail
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#003351
Analogous#51000B, #514700
Triadic#00511E, #1E0051
Split complementary#005146, #000B51
Tetradic#0A5100, #003351, #460051
Tints, shades & saturation
Channel breakdown
R81
G30
B0
Red81 (31.8%)
Green30 (11.8%)
Blue0 (0%)
Hue22.22°
Saturation (HSL)100%
Lightness15.88%
Dominant channelRed
Hex per channelR 51 · G 1E · B 00
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