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What property of a line is related to the transparency / opacity or alpha of a line?

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when i plot a line with transparency by means of rgba color triplet and opacity.
hline = plot(x,y,'color',[1,0,0,0.5])
What property of the resulting handle is changed? I cannot find anything in the color triplet, nor can i find a seperate property like 'Alpha' or 'FaceAlpha' or anything similar.

Accepted Answer

Ameer Hamza
Ameer Hamza on 14 Oct 2020
Edited: Ameer Hamza on 14 Oct 2020
You can access the alpha value using this line
alpha_val = hline.Edge.get.ColorData(4)
It is in uint8, you can convert to double
alpha_val = double(hline.Edge.get.ColorData(4))/255

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