[Script] Change/reset the foreground color of a block diagram/specific blocks in a block diagram

 There are specific situations where you may want to change the foreground (or even background) of blocks within a Simulink model. In some cases, you might want to revert to a stock color scheme if you've been too... creative with the colors of your diagram (or someone else who had previously worked on the same model has opted for a very colorful model). In other cases, someone might have wanted to highlight changes in a model, but this is no longer relevant since you will now implement your own. Therefore, you will have to revert to a black foreground for all blocks.

Doing this manually would be a tedious job, whereas with a script, it would be almost instantaneous. 

Let's consider the following model, where I've set the foreground color of two blocks to green.

Here's a script to revert all block foreground colors to black.

blocks = find_system('testforeground'); %replace testforeground with your model name if length(blocks)>1 %check that the model is not empty for i = 2 : length(blocks) % the first element is the model itself if string(get_param(string(blocks{i}),'ForegroundColor')) ~= 'black' %replace with == 'color_of_choice' if you only wish to revert specific colors set_param(string(blocks{i}),'ForegroundColor','black') %you may also act upon the background color by using BackgroundColor as the second parameter of get_param and set_param end end end

This is the end result.

Now, let's consider that you wanted to change the foreground color of all blocks of a specific type (let's say, our constant blocks). Here's a variation of the above script that will help you do that.

blocks = find_system('testforeground'); %replace testforeground with your model name if length(blocks)>1 %check that the model is not empty for i = 2 : length(blocks) % the first element is the model itself if string(get_param(string(blocks{i}),'BlockType')) == 'Constant' %replace Constant with block type of your choice set_param(string(blocks{i}),'ForegroundColor','blue') %you may also act upon the background color by using BackgroundColor as the second parameter of get_param and set_param end end end

And here's newly highlighted model.

We can further enhance the functionality, the possibilities are endless. For example, we could create a comparison script between two models, highlighting the added or removed blocks. But that one is for another day.