Decimal number
680
- Positive
- Decimal
- 0 d.p.
- Exact fraction
680 is a decimal number equal to 680⁄1. It lies between 680 and 680, and as a percentage it is 68,000%.
Number properties
Fractions & ratios
Arithmetic
Representations
Decimal680
Scientific notation6.8 × 10^2
Exponential6.8e+2
IEEE 754 binary64 (hex)0x4085400000000000the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x442A000032-bit single precision, may lose accuracy
Rounding
To 0 decimal places680
To 1 decimal place680.0
To 2 decimal places680.00
To 3 decimal places680.000
To 4 decimal places680.0000
To 1 significant figure700
To 2 significant figures680
To 3 significant figures680
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Also reads as
#0068E1 (colour)
- #0068E1
- Blue
- Dark
- Nearest: Royal blue
#0068E1 is a blue with RGB values 0, 104, 225 and HSL 212°, 100%, 44%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Royal blue.
Colour values
#0068E1#0068E1
HEX#0068E1
RGBrgb(0, 104, 225)
RGB (0–1)0, 0.4078, 0.8824
RGB percentages0%, 40.8%, 88.2%
HSLhsl(212.3, 100%, 44.1%)
HSV / HSBhsv(212.3, 100%, 88.2%)
CMYK100%, 53.8%, 0%, 11.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer26,849
CSS custom property--colour: #0068E1;
Brightness & contrast
Relative luminance0.15337WCAG 2.x, 0 is black and 1 is white
Perceived brightness110.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.16:1
Contrast with white5.16:1WCAG normal text: AA
Contrast with black4.07:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#FF971E
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.16:1WCAG large text: AAA
Contrast with black, large text4.07:1WCAG large text: AA
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#E17900
Analogous#00D9E1, #0800E1
Triadic#E10068, #68E100
Split complementary#E10800, #D9E100
Tetradic#E100D9, #E17900, #00E108
Tints, shades & saturation
Channel breakdown
R0
G104
B225
Red0 (0%)
Green104 (40.8%)
Blue225 (88.2%)
Hue212.27°
Saturation (HSL)100%
Lightness44.12%
Dominant channelBlue
Hex per channelR 00 · G 68 · B E1
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Harmonies
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