variable color-text for "imtext" function...

I have used the "imtext" function successfully to display any string of text within an image. Here is a successful example for displaying the text "mean" at location (x,y) = (0.25,0.75) using a specific RGB color for the text "mean":

imtext(0.25,0.75,'\color[rgb]{0.5 0.25 0.1} mean');

Now let's assume that I have a vector: rgb_vector = [0.5 0.25 0.1]

If I try the following command, it fails to work:

imtext(0.25,0.75,'\color[rgb]{rgb_vector} mean');

I have tried to convert rgb_vector to string using "num2str" and "mat2str" but both failed to work. I also tried to convert the vector to a cell array using num2cell and mat2cell, but none of these solutions worked either.

Here are typical warning/error messages that I get:

{

Unable to interpret TeX string "\color[rgb]{rgb_vector} mean"

Unable to interpret TeX string "\color[rgb]{num2str(rgb_vector)} mean"

Unable to interpret TeX string "\color[rgb]{mat2str(vec)} mean"

Unable to interpret TeX string "\color[rgb]{num2cell(rgb_vector)} mean"

Unable to interpret TeX string "\color[rgb]{mat2cell(rgb_vector)} mean"

}

Would appreciate any solution that someone may have!

Thanks;