Recognised as Dice notation

1d20

1d20
1 to 20
mean 10.5

Rolling 1d20 gives a total between 1 and 20, with a mean of 10.5 and a standard deviation of 5.7663. There are 20 equally likely ordered outcomes, and the most likely total is 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10 or 11 or 12 or 13 or 14 or 15 or 16 or 17 or 18 or 19 or 20 at 5%.

The roll

Notation1d20

Dice1

Faces per die20

Minimum total1a 1

Maximum total20all 1 dice showing 20

Distinct totals20

Mean10.5n(f + 1)/2 + modifier, exact

Variance33.25n(f² − 1)/12, exact

Standard deviation5.7662813≈

Counting the outcomes

Ordered outcomes2020^1, every die distinguishable

Most likely total1 and 2 and 3 and 4 and 5 and 6 and 7 and 8 and 9 and 10 and 11 and 12 and 13 and 14 and 15 and 16 and 17 and 18 and 19 and 20two totals share the peak

Chance of that total5%≈

Ways to roll it1exact count

Chance of the minimum5%≈1 in 20

Chance of the maximum5%≈1 in 20

Probability of each total

Exact counts, by enumeration over every combination.

15%

25%

35%

45%

55%

65%

75%

85%

95%

105%

115%

125%

135%

145%

155%

165%

175%

185%

195%

205%

15%1 way

25%1 way

35%1 way

45%1 way

55%1 way

65%1 way

75%1 way

85%1 way

95%1 way

105%1 way

115%1 way

125%1 way

135%1 way

145%1 way

155%1 way

165%1 way

175%1 way

185%1 way

195%1 way

205%1 way

Chance of rolling at least

390%≈

675%≈

1150%≈

1530%≈

1815%≈

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

The same dice, different counts

The same count, different dice

Also reads as

#11DD22 (colour)

#11DD22
Green
Light
Nearest: Limegreen

#11DD22 is a green with RGB values 17, 221, 34 and HSL 125°, 86%, 47%. It is a light colour, so black text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Limegreen.

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Colour values

#11DD22#11DD22

HEX#11DD22

HEX (short)#1D2

RGBrgb(17, 221, 34)

RGB (0–1)0.0667, 0.8667, 0.1333

RGB percentages6.7%, 86.7%, 13.3%

HSLhsl(125, 85.7%, 46.7%)

HSV / HSBhsv(125, 92.3%, 86.7%)

CMYK92.3%, 0%, 84.6%, 13.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,170,722

CSS custom property--colour: #11DD22;

Brightness & contrast

Relative luminance0.51948WCAG 2.x, 0 is black and 1 is white

Perceived brightness170 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 11.39:1

Contrast with white1.84:1WCAG normal text: Fail

Contrast with black11.39:1WCAG normal text: AAA

Greyscale equivalent#A4A4A4

Inverted#EE22DD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#E2C700no red cones; affects about 1% of men; ΔE 70.5 from the original

Deuteranopia#CFBA3Dno green cones; the most common form, about 1% of men; ΔE 70 from the original

Tritanopia#00D6BCno blue cones; rare, and affects men and women equally; ΔE 74.4 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text1.84:1WCAG large text: Fail

Contrast with black, large text11.39:1WCAG large text: AAA

Named colours

Limegreen · ΔE 13.1 Lime · ΔE 19.7 Lawn green · ΔE 20.5 Chartreuse · ΔE 21.6 Spring green · ΔE 25.7 Green yellow · ΔE 30

Nearest named CSS colourLimegreen (#32CD32)ΔE 13.1, a distinctly different colour

Hue familygreen

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#DD11CC

Analogous#66DD11, #11DD88

Triadic#2211DD, #DD2211

Split complementary#8811DD, #DD1166

Tetradic#1166DD, #DD11CC, #DD8811

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#C0FAC5

Lighter +30%#90F799

Lighter +20%#61F36D

Lighter +10%#32EF42

Darker −10%#0DAE1B

Darker −20%#0A7E13

Darker −30%#064F0C

Darker −40%#022005

More saturated +25%#00EE14

Less saturated −25%#2FBF3B

Channel breakdown

R17

G221

B34

Red17 (6.7%)

Green221 (86.7%)

Blue34 (13.3%)

Hue125°

Saturation (HSL)85.71%

Lightness46.67%

Dominant channelGreen

Hex per channelR 11 · G DD · B 22

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

1d20

The roll

Counting the outcomes

Probability of each total

Chance of rolling at least

Keep nerding

The same dice, different counts

The same count, different dice

#11DD22 (colour)

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

Nerdulate something else