Change an image with onclick()

I want to change an image to some other image when i click on the object. the code is stacked in the following order:

<li><img><some text></img></li>
<li><img><some text></img></li>
<li><img><some text></img></li>
<li><img><some text></img></li>
<li><img><some text></img></li>

What I wish to do is, when I click on the <li> i want to change the image to a coloured version of the image, i.e. some other image. Now, I know I can use JQuery/JS to accomplish it. But I don’t want a huge amount of JS code to accomplish something so simple.

Can it be done using something simpler? Like pseudo selectors? .active class?

I cannot seem to think of it.