how do i get the color gray

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lowcalorie
lowcalorie on 23 May 2012
Edited: Hans Scharler on 13 May 2022
how do i get the color gray on my graph

Accepted Answer

Hans Scharler
Hans Scharler on 13 May 2022
Edited: Hans Scharler on 13 May 2022
As others have pointed out, gray is the result of the Red, Green, and Blue are equal somewhere between 0 and 1 where black is [0 0 0] and white is [1 1 1].
x = rand(200,4);
y = rand(200,4);
grayColor = [.7 .7 .7];
plot(x, y, 'Color', grayColor)
If you are you used to 255 color values from HTML for example, you can divide by 255 to get a value between 0 and 1. Classic HTML gray is [128, 128, 128].
x = rand(200,4);
y = rand(200,4);
htmlGray = [128 128 128]/255;
plot(x, y, 'Color', htmlGray)

More Answers (1)

Walter Roberson
Walter Roberson on 23 May 2012
Gray is any RGB color with Red, Green, and Blue components all equal, excepting black (all 0's) and white (all components the maximum).
For example,
plot(x, y, 'Color', [17 17 17])
  4 Comments
Walter Roberson
Walter Roberson on 28 Jul 2020
Which MATLAB release are you using?
plot(rand(1,5), 'Color', uint8([17 17 17]))
hold on
plot(rand(1,5), 'Color', [17 17 17]/255)
hold off
works for me.
Note that there are some plot attributes that only accept floating point, such as most Alpha values. In that case you would need the /255 form.

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