Wordpress theme customization CSS

How can i change Menu hover color in ecoshop wordpress theme. This theme buy form envato elements where i can find navbar css.

https://elements.envato.com/ecoshop-multipurpose-ecommerce-html5-template-DBTMXN

Please suggest me how to edit css of the Wordpress theme

This link that you have included are not a Wordpress theme it is html actually. If you need to customize the color try to read the documentation of this item or try to reach out the author of template he will be very glad to help.