In R2019b and later version, for tables(uitable) created on uifigure or in container objects parented to uifigure (such as uipanel, uitab), you can use the uistyle / addStyle functions to specify the text color, background color, and other formatting options for certain cell in the table.
uit = uitable(uifigure, 'Data', randn(3));
[row,col] = find(uit.Data < 0); % get the index for negative values
s1 = uistyle;
s1.FontColor = 'red'; % set the style format
addStyle(uit,s1,'cell',[row,col]); % add style for the table
For details, please refer the documentation pages.
