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Decimal number

400

  • Positive
  • Decimal
  • 0 d.p.
  • Exact fraction

400 is a decimal number equal to 400⁄1. It lies between 400 and 400, and as a percentage it is 40,000%.

Number properties

Absolute value400
SignPositive
Integer part400
Fractional part0
Decimal places0
Floor400
Ceiling400
Rounded to nearest400
Truncated400

Fractions & ratios

As a fraction400/1exact
Ratio400 : 1
As a percentage40,000%
Reciprocal0.0025≈

Arithmetic

Double800
Half200
Square160,000
Cube64,000,000
Square root20≈
Cube root7.3680629973≈
Negation-400
Natural logarithm5.9914645471≈
Logarithm base 102.6020599913≈

Representations

Decimal400
Scientific notation4 × 10^2
Exponential4e+2
IEEE 754 binary64 (hex)0x4079000000000000the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x43C8000032-bit single precision, may lose accuracy

Rounding

To 0 decimal places400
To 1 decimal place400.0
To 2 decimal places400.00
To 3 decimal places400.000
To 4 decimal places400.0000
To 1 significant figure400
To 2 significant figures400
To 3 significant figures400

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Neighbouring values

As a fraction

Also reads as

#040E01 (colour)

  • #040E01
  • Green
  • Dark
  • Nearest: Black

#040E01 is a green with RGB values 4, 14, 1 and HSL 106°, 87%, 3%. It is a dark colour, so white text on it reaches 19.7:1 contrast (AAA for normal text). The nearest named colour is Black.

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Colour values

#040E01#040E01
HEX#040E01
RGBrgb(4, 14, 1)
RGB (0–1)0.0157, 0.0549, 0.0039
RGB percentages1.6%, 5.5%, 0.4%
HSLhsl(106.2, 86.7%, 2.9%)
HSV / HSBhsv(106.2, 92.9%, 5.5%)
CMYK71.4%, 0%, 92.9%, 94.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer265,729
CSS custom property--colour: #040E01;

Brightness & contrast

Relative luminance0.00342WCAG 2.x, 0 is black and 1 is white
Perceived brightness11 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.66:1
Contrast with white19.66:1WCAG normal text: AAA
Contrast with black1.07:1WCAG normal text: Fail
Greyscale equivalent#0B0B0B
Inverted#FBF1FE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F0C00no red cones; affects about 1% of men; ΔE 4 from the original
Deuteranopia#0D0B02no green cones; the most common form, about 1% of men; ΔE 4 from the original
Tritanopia#040D0Ano blue cones; rare, and affects men and women equally; ΔE 4.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.66:1WCAG large text: AAA
Contrast with black, large text1.07:1WCAG large text: Fail

Named colours

Black · ΔE 6.9Dark slate grey · ΔE 30.1Dim grey · ΔE 41.8Dark olivegreen · ΔE 49.3Gray · ΔE 50.9Slate grey · ΔE 51.9
Nearest named CSS colourBlack (#000000)ΔE 6.92, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0B010E
Analogous#0B0E01, #010E04
Triadic#01040E, #0E0104
Split complementary#05010E, #0E010A
Tetradic#010A0E, #0B010E, #0E0401

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3ACC0F
Lighter +30%#2D9D0B
Lighter +20%#1F6D08
Lighter +10%#123E04
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#030F00
Less saturated −25%#050C03

Channel breakdown

R4
G14
B1
Red4 (1.6%)
Green14 (5.5%)
Blue1 (0.4%)
Hue106.15°
Saturation (HSL)86.67%
Lightness2.94%
Dominant channelGreen
Hex per channelR 04 · G 0E · B 01

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Every value on this page was computed from “040e01” by Nerdulator’s number engine. Nothing here was retrieved from a database of answers or written by a model.