Squarespace darkens Button colors on hover.

I'm customizing a button and for the life of me I can't seem to find out how to edit the hover effect on the color. Squarespace has this hover effect on buttons that seems to darken the color on text, background, and border. I'm trying to keep the colors the stay the same on hover.

Attached images of the normal state and hover state (with box-shadow). On the hover state you can see a slight shift in color. I've looked through the code and site styles and can't seem to find what is effecting the color on hover in Squarespace. It's not an "opacity" setting. I've already tried that. 

Any help with be appreciated. Thanks! 🙂

Can you share your website URL?

I'm just playing around in Squarespace at the moment to see what's possible. I dont have an actual site yet.