Masonry grid roll over colour

Hello,

This is my 5th Unicon page 🙂 I love your work!
This time I would like to try the Masonry grid on my landing page (still under construction iqubeyou.com/startseite)
The problem: I would like to change the roll over effect on the grid elements and I cannot find any options for that. Black does not fit my branding. Could you please let me know how to do it. Thank you.

Ewa from Gillen Design

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