Step by step transparent menu direction

Hi there,

I seem to be having a difficult time figuring out how to create a partially transparent menu with your theme. I need to add a menu with a background color of 90% transparent color #a7a7a7 and I can seem to figure it out. I can even figure out a 100% percent transparent.

I’m trying to match what you have on your “agency” but its not easy.

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