How can I apply format/styles to nodes which are within the range of selection?

[aperezgarcia93]

Hi everyone! I've been trying to read all the docs and search for resources but I wasn't able to find anything useful.

I'm trying to do something which I thought it would be easier, but I did not find any way to achieve it.

What I want is basically change the color of the selection, something like in this image:

In the image above, the first paragraph has been selected using the cursor, so when I click on another part, last selection gets another color, so basically, if I select a new line or whatever, I remove that color from the previous one and add the color to the new line, like this:

However, I wasn't able to find any way to achieve this, neither applying styles to the nodes, neither replacing them... I don't know how to perform this, anyone has any idea? Thanks a lot!!