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setting transparancy of legend?

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Micke Malmström
Micke Malmström on 12 Jan 2017
Edited: Adam Danz on 30 Apr 2024
Is it possible to make the background of the legend be slighly transparent so that the lines behind it can be somewat visible?
  1 Comment
Walter Roberson
Walter Roberson on 16 Jan 2017
I will not say that it is impossible at the moment. It is certainly not documented. You just might be able to change it using one of the hidden properties of the legend. Perhaps one of the ColorSpace properties. Nothing I have tried has worked yet.

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Accepted Answer

Afiq Azaibi
Afiq Azaibi on 26 Apr 2024
Edited: Adam Danz on 30 Apr 2024
Starting in R2024a, legend supports the ability to control the level of transparency with the BackgroundAlpha property. Below is a short example:
grid on;
set(gca, 'Color', [.88 .88 .88]);
l = legend(BackgroundAlpha=.7);
Setting the value to 0 will make it fully transparent and a value 1 of will make it fully opaque which is the default behavior.
Rectangle also has a new FaceAlpha property and you can read more about both in this blog post.
Other answers in this thread address solutions prior to R2024a.

More Answers (3)

alice on 27 Jun 2017
In undocumented Matlab, you will find how to do it here:

Ilja Maljutenko
Ilja Maljutenko on 19 May 2021
This solution seems to work in Matlab 2020 +
h_leg.BoxFace.ColorData=uint8(255*[1 1 1 0.75]');
where h_leg is your legend box handle.

Wilson A N
Wilson A N on 16 Jan 2017
Edited: Walter Roberson on 16 Jan 2017
You can refer to the link given below on how to set the different properties of legend
To change the background color of the legend you can change the 'Color' field to achieve the required transparency.

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