WooCommerce Buttons

Hello, today there was an update of the theme Vantage and I use the plugin YITH Woocommerce Request A Quote, after the update, all buttons were in the gray color and need to be in the color blue, as it always was.
I have already made numerous attempts in CSS and partially resolved using the class below:

a.button, button, html input [type = button], input [type = reset], input [type = submit], .post-navigation a, # image-navigation a, article.post .more-link, article. page .more-link, .paging-navigation a, .woocommerce # page-wrapper .button, .woocommerce a.button, .woocommerce .checkout-button, .woocommerce input.button, .woocommerce #respond input # submit.alt, .woocommerce a.button.alt, .woocommerce button.button.alt, .woocommerce input.button.alt, # infinite-handle span
{
background-color: # 4682b4;
}

But when the mouse is positioned over the button, it turns gray and I can not solve it, I tried to: hover, a: focus in the above CSS and it did not work.

Can you guys help me, please?

Thank you,

Vanderlei
Virtual Machines

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