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Recognised as Dice notation

9d21

  • 9d21
  • 9 to 189
  • mean 99
  • mode 99

Rolling 9d21 gives a total between 9 and 189, with a mean of 99 and a standard deviation of 18.1659. There are 794,280,046,581 equally likely ordered outcomes, and the most likely total is 99 at 2.159%.

The canonical address for this page is /9d21.

The roll

Notation9d21
Dice9
Faces per die21
Minimum total9all 9 dice showing 1
Maximum total189all 9 dice showing 21
Distinct totals181
Mean99n(f + 1)/2 + modifier, exact
Variance330n(f² − 1)/12, exact
Standard deviation18.16590212≈

Counting the outcomes

Ordered outcomes794,280,046,58121^9, every die distinguishable
Most likely total99
Chance of that total2.159056%≈
Ways to roll it17,148,949,027exact count
Chance of the minimum1.25900179 × 10^-10%≈1 in 794,280,046,581
Chance of the maximum1.25900179 × 10^-10%≈1 in 794,280,046,581

Shape of the distribution

181 distinct totals, too many to list individually.

1st percentile57≈1.026% of rolls are this or lower
5th percentile69≈5.256% of rolls are this or lower
25th percentile87≈26.638% of rolls are this or lower
50th percentile99≈51.08% of rolls are this or lower
75th percentile111≈75.121% of rolls are this or lower
95th percentile129≈95.325% of rolls are this or lower
99th percentile141≈99.126% of rolls are this or lower

Chance of rolling at least

2799.9996%≈
5499.4738%≈
9951.0795%≈
1440.6258%≈
1710.0006%≈

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The same dice, different counts

The same count, different dice

Also reads as

#09D021 (colour)

  • #09D021
  • Green
  • Dark
  • Nearest: Limegreen

#09D021 is a green with RGB values 9, 208, 33 and HSL 127°, 92%, 43%. It is a dark colour, so black text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

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Colour values

#09D021#09D021
HEX#09D021
RGBrgb(9, 208, 33)
RGB (0–1)0.0353, 0.8157, 0.1294
RGB percentages3.5%, 81.6%, 12.9%
HSLhsl(127.2, 91.7%, 42.5%)
HSV / HSBhsv(127.2, 95.7%, 81.6%)
CMYK95.7%, 0%, 84.1%, 18.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer643,105
CSS custom property--colour: #09D021;

Brightness & contrast

Relative luminance0.4528WCAG 2.x, 0 is black and 1 is white
Perceived brightness159.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 10.06:1
Contrast with white2.09:1WCAG normal text: Fail
Contrast with black10.06:1WCAG normal text: AAA
Greyscale equivalent#999999
Inverted#F62FDE

Colour vision & accessibility

Protanopia#D4BB00no red cones; affects about 1% of men; ΔE 67.4 from the original
Deuteranopia#C2AE3Ano green cones; the most common form, about 1% of men; ΔE 67.3 from the original
Tritanopia#00CAB1no blue cones; rare, and affects men and women equally; ΔE 70.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.09:1WCAG large text: Fail
Contrast with black, large text10.06:1WCAG large text: AAA

Named colours

Nearest named CSS colourLimegreen (#32CD32)ΔE 7.53, clearly different but related
Hue familygreen
CSS keyword usableNo exact keyword

Colour harmonies

Complementary#D009B8
Analogous#55D009, #09D084
Triadic#2109D0, #D02109
Split complementary#8409D0, #D00955
Tetradic#0955D0, #D009B8, #D08409

Tints, shades & saturation

Lighter +40%#AAFBB4
Lighter +30%#79F988
Lighter +20%#48F75D
Lighter +10%#17F532
Darker −10%#079F19
Darker −20%#056E11
Darker −30%#033D0A
Darker −40%#010C02
More saturated +25%#00D91A
Less saturated −25%#24B536

Channel breakdown

R9
G208
B33
Red9 (3.5%)
Green208 (81.6%)
Blue33 (12.9%)
Hue127.24°
Saturation (HSL)91.71%
Lightness42.55%
Dominant channelGreen
Hex per channelR 09 · G D0 · B 21

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Every value on this page was computed from “09d021” by Nerdulator’s games engine. Nothing here was retrieved from a database of answers or written by a model.