Effect for images

Good afternoon, thank you very much in advance.
My page is the NEXT: https://www.egr-studio.com (THEME: SYDNEY)

I would like to create the following effect for the images (https://www.oliverburns.com/). When you hover over the image it gets a transparent purple with text above .
You know some plugin to do this ? With CSS perhaps?

Ideas?
Thanks alot!!!