Changing theme colors

Hello,
I’ve installed and activated your plugin and have done only tests and I’ve noticed that the colors of add button change to purple (theme color is green) and color of Select options changed to grey (!) (before it was also green). So I deactivated the plugin and green colors came back.

Is the plugin change something at the beggining (without any configuration)? I’d like to use the plugin but original colors were important for me.

And the second question: Is it possible to use the plugin without turning on the cache? Almost all pages on my website are dynamic (dynamic pricing, basket icon showing the number of products in the basket) so I can’t use cache. But I’d like use other your features