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Recognised as Dice notation

21d221

  • 21d221
  • 21 to 4641
  • mean 2,331
  • mode 2331

Rolling 21d221 gives a total between 21 and 4,641, with a mean of 2,331 and a standard deviation of 292.3525. There are 17,070,166,114,991,459,240,706,231,271,470,061,927,701,206,408,621 equally likely ordered outcomes, and the most likely total is 2,331 at 0.135%.

The roll

Notation21d221
Dice21
Faces per die221
Minimum total21all 21 dice showing 1
Maximum total4,641all 21 dice showing 221
Distinct totals4,621
Mean2,331n(f + 1)/2 + modifier, exact
Variance85,470n(f² − 1)/12, exact
Standard deviation292.35252693≈

Counting the outcomes

Ordered outcomes17,070,166,114,991,459,240,706,231,271,470,061,927,701,206,408,621221^21, every die distinguishable
Most likely total2,331
Chance of that total0.135481%≈
Ways to roll it23,126,851,735,913,915,880,062,236,197,180,344,100,662,398,631exact count
Chance of the minimum5.85817381 × 10^-48%≈1 in 17,070,166,114,991,459,240,706,231,271,470,061,927,701,206,408,621
Chance of the maximum5.85817381 × 10^-48%≈1 in 17,070,166,114,991,459,240,706,231,271,470,061,927,701,206,408,621

Shape of the distribution

4,621 distinct totals, too many to list individually.

1st percentile1,655≈1.006% of rolls are this or lower
5th percentile1,850≈5.026% of rolls are this or lower
25th percentile2,133≈25.097% of rolls are this or lower
50th percentile2,331≈50.068% of rolls are this or lower
75th percentile2,529≈75.011% of rolls are this or lower
95th percentile2,812≈95.01% of rolls are this or lower
99th percentile3,007≈99.003% of rolls are this or lower

Chance of rolling at least

483100%≈
1,17699.9979%≈
2,33150.0677%≈
3,4860.0022%≈
4,1791.70113357 × 10^-11%≈

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The same dice, different counts

The same count, different dice

Also reads as

#21D221 (colour)

  • #21D221
  • Green
  • Dark
  • Nearest: Limegreen

#21D221 is a green with RGB values 33, 210, 33 and HSL 120°, 73%, 48%. It is a dark colour, so black text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

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Colour values

#21D221#21D221
HEX#21D221
RGBrgb(33, 210, 33)
RGB (0–1)0.1294, 0.8235, 0.1294
RGB percentages12.9%, 82.4%, 12.9%
HSLhsl(120, 72.8%, 47.6%)
HSV / HSBhsv(120, 84.3%, 82.4%)
CMYK84.3%, 0%, 84.3%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,216,481
CSS custom property--colour: #21D221;

Brightness & contrast

Relative luminance0.46526WCAG 2.x, 0 is black and 1 is white
Perceived brightness162.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.31:1
Contrast with white2.04:1WCAG normal text: Fail
Contrast with black10.31:1WCAG normal text: AAA
Greyscale equivalent#A0A0A0
Inverted#DE2DDE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#D7BD00no red cones; affects about 1% of men; ΔE 66.7 from the original
Deuteranopia#C5B13Ano green cones; the most common form, about 1% of men; ΔE 66 from the original
Tritanopia#00CCB3no blue cones; rare, and affects men and women equally; ΔE 70.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.04:1WCAG large text: Fail
Contrast with black, large text10.31:1WCAG large text: AAA

Named colours

Limegreen · ΔE 7.5Lawn green · ΔE 23.4Chartreuse · ΔE 24.7Spring green · ΔE 25.6Lime · ΔE 25.6Green yellow · ΔE 30.1
Nearest named CSS colourLimegreen (#32CD32)ΔE 7.54, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D221D2
Analogous#79D221, #21D279
Triadic#2121D2, #D22121
Split complementary#7921D2, #D22179
Tetradic#2179D2, #D221D2, #D27921

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9F6C9
Lighter +30%#9CF09C
Lighter +20%#70E970
Lighter +10%#44E244
Darker −10%#1AA61A
Darker −20%#137A13
Darker −30%#0C4E0C
Darker −40%#052205
More saturated +25%#03F003
Less saturated −25%#3FB43F

Channel breakdown

R33
G210
B33
Red33 (12.9%)
Green210 (82.4%)
Blue33 (12.9%)
Hue120°
Saturation (HSL)72.84%
Lightness47.65%
Dominant channelGreen
Hex per channelR 21 · G D2 · B 21

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Every value on this page was computed from “21d221” by Nerdulator’s games engine. Nothing here was retrieved from a database of answers or written by a model.