Recognised as Dice notation
21d7
- 21d7
- 21 to 147
- mean 84
- mode 84
Rolling 21d7 gives a total between 21 and 147, with a mean of 84 and a standard deviation of 9.1652. There are 558,545,864,083,284,007 equally likely ordered outcomes, and the most likely total is 84 at 4.32%.
The roll
Notation21d7
Dice21
Faces per die7
Minimum total21all 21 dice showing 1
Maximum total147all 21 dice showing 7
Distinct totals127
Mean84n(f + 1)/2 + modifier, exact
Variance84n(f² − 1)/12, exact
Standard deviation9.16515139≈
Counting the outcomes
Ordered outcomes558,545,864,083,284,0077^21, every die distinguishable
Most likely total84
Chance of that total4.320341%≈
Ways to roll it24,131,083,600,660,801exact count
Chance of the minimum1.79036327 × 10^-16%≈1 in 558,545,864,083,284,007
Chance of the maximum1.79036327 × 10^-16%≈1 in 558,545,864,083,284,007
Shape of the distribution
127 distinct totals, too many to list individually.
1st percentile63≈1.224% of rolls are this or lower
5th percentile69≈5.696% of rolls are this or lower
25th percentile78≈27.544% of rolls are this or lower
50th percentile84≈52.16% of rolls are this or lower
75th percentile90≈75.963% of rolls are this or lower
95th percentile99≈95.462% of rolls are this or lower
99th percentile105≈99.092% of rolls are this or lower
Chance of rolling at least
34100%≈
5399.9787%≈
8452.1602%≈
1160.0213%≈
1341.65029877 × 10^-7%≈
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Also reads as
#2211DD (colour)
- #2211DD
- Blue
- Dark
- Nearest: Medium blue
#2211DD is a blue with RGB values 34, 17, 221 and HSL 245°, 86%, 47%. It is a dark colour, so white text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Medium blue.
Colour values
#2211DD#2211DD
HEX#2211DD
HEX (short)#21D
RGBrgb(34, 17, 221)
RGB (0–1)0.1333, 0.0667, 0.8667
RGB percentages13.3%, 6.7%, 86.7%
HSLhsl(245, 85.7%, 46.7%)
HSV / HSBhsv(245, 92.3%, 86.7%)
CMYK84.6%, 92.3%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,232,797
CSS custom property--colour: #2211DD;
Brightness & contrast
Relative luminance0.05961WCAG 2.x, 0 is black and 1 is white
Perceived brightness78 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.58:1
Contrast with white9.58:1WCAG normal text: AAA
Contrast with black2.19:1WCAG normal text: Fail
Greyscale equivalent#232323
Inverted#DDEE22
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.58:1WCAG large text: AAA
Contrast with black, large text2.19:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#CCDD11
Analogous#1166DD, #8811DD
Triadic#DD2211, #11DD22
Split complementary#DD8811, #66DD11
Tetradic#DD1166, #CCDD11, #11DD88
Tints, shades & saturation
Channel breakdown
R34
G17
B221
Red34 (13.3%)
Green17 (6.7%)
Blue221 (86.7%)
Hue245°
Saturation (HSL)85.71%
Lightness46.67%
Dominant channelBlue
Hex per channelR 22 · G 11 · B DD
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Harmonies
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