Default Dropdown nav transparency issue

Hello, tiny issue, but I can’t seem to find where it’s coming from. I’m using the default dropdown navigation item, and on hover the subnav turn transparent. I can’t to find where this is coming from… How can I keep it 100% opaque?

Thank you in advance!

Here is my public share link: LINK
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Nevermind! A developer helped me with it. Thx