Hi there,
Thanks for mentioning you are using a plugin to manage discount. I was very confused today why strikethrough isn’t showing on the usual price today 🙂
WooCommerce adds the strikethrough by default so you will have to ask the plugin support (the manage discount one) how you can add it back.
As for the color, can you also ask the plugin support if there is a way to add a special class to the discounted price? Currently the usual price and discount price has the exact same classes so we can’t just select one.
Let me know 🙂