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Decimal number

221

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

221 is a decimal number equal to 221⁄1. It lies between 221 and 221, and as a percentage it is 22,100%.

Number properties

Absolute value221
SignPositive
Integer part221
Fractional part0
Decimal places0
Floor221
Ceiling221
Rounded to nearest221
Truncated221

Fractions & ratios

As a fraction221/1exact
Ratio221 : 1
As a percentage22,100%
Reciprocal0.0045248869≈

Arithmetic

Double442
Half110.5
Square48,841
Cube10,793,861
Square root14.8660687473≈
Cube root6.045943596≈
Negation-221
Natural logarithm5.3981627015≈
Logarithm base 102.3443922737≈

Representations

Decimal221
Scientific notation2.21 × 10^2
Exponential2.21e+2
IEEE 754 binary64 (hex)0x406BA00000000000the exact 64-bit pattern stored
IEEE 754 binary32 (hex)0x435D000032-bit single precision, may lose accuracy

Rounding

To 0 decimal places221
To 1 decimal place221.0
To 2 decimal places221.00
To 3 decimal places221.000
To 4 decimal places221.0000
To 1 significant figure200
To 2 significant figures220
To 3 significant figures221

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Neighbouring values

As a fraction

Also reads as

#221E00 (colour)

  • #221E00
  • Yellow
  • Dark
  • Nearest: Black

#221E00 is a yellow with RGB values 34, 30, 0 and HSL 53°, 100%, 7%. It is a dark colour, so white text on it reaches 16.8:1 contrast (AAA for normal text). The nearest named colour is Black.

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Colour values

#221E00#221E00
HEX#221E00
RGBrgb(34, 30, 0)
RGB (0–1)0.1333, 0.1176, 0
RGB percentages13.3%, 11.8%, 0%
HSLhsl(52.9, 100%, 6.7%)
HSV / HSBhsv(52.9, 100%, 13.3%)
CMYK0%, 11.8%, 100%, 86.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,235,904
CSS custom property--colour: #221E00;

Brightness & contrast

Relative luminance0.01269WCAG 2.x, 0 is black and 1 is white
Perceived brightness29.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.75:1
Contrast with white16.75:1WCAG normal text: AAA
Contrast with black1.25:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#DDE1FF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#221D00no red cones; affects about 1% of men; ΔE 0.9 from the original
Deuteranopia#231E01no green cones; the most common form, about 1% of men; ΔE 0.7 from the original
Tritanopia#261B18no blue cones; rare, and affects men and women equally; ΔE 14.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.75:1WCAG large text: AAA
Contrast with black, large text1.25:1WCAG large text: Fail

Named colours

Black · ΔE 20Dark slate grey · ΔE 29.9Dim grey · ΔE 37.3Dark olivegreen · ΔE 37.9Gray · ΔE 45.7Saddle brown · ΔE 46.4
Nearest named CSS colourBlack (#000000)ΔE 19.96, a distinctly different colour
Hue familyyellow
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#000422
Analogous#220D00, #152200
Triadic#00221E, #1E0022
Split complementary#001522, #0D0022
Tetradic#00220D, #000422, #220015

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EED200
Lighter +30%#BBA500
Lighter +20%#887800
Lighter +10%#554B00
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#221E00
Less saturated −25%#1E1B04

Channel breakdown

R34
G30
B0
Red34 (13.3%)
Green30 (11.8%)
Blue0 (0%)
Hue52.94°
Saturation (HSL)100%
Lightness6.67%
Dominant channelRed
Hex per channelR 22 · G 1E · B 00

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Every value on this page was computed from “221e00” by Nerdulator’s number engine. Nothing here was retrieved from a database of answers or written by a model.