How to Change Sale Now Price to red using Bigcommerce stencil theme

Another most repeat asked question at Bigcommerce forum

https://support.bigcommerce.com/s/question/0D74O000006ChGY/how-to-change-sale-now-price-to-red?s1oid=00D30000001FDCG&s1nid=0DB13000000Gmw5&emkind=chatterCommentNotification&s1uid=0051B00000Cdq7l&emtm=1574301765902&fromEmail=1&s1ext=0

Paste below code at footer script 

<style>
.price-section--withoutTax span.price {
color: red; 
}
.price-section--withoutTax.non-sale-price--withoutTax span.price , .price-section--withoutTax.rrp-price--withoutTax span.price  {
color: #343434; 
}
</style>