Hi @Unfurl , thank you for posting here!
You can follow the instruction below:
- Go to Online Store->Theme->Edit code
- Asset->/base.css->paste the below code at the bottom of the file:
.price--on-sale .price-item--regular {
background-color: [the hex code color you want to change];
}
.product-item__badge.product-item__badge--sale {
background-color: [the hex code color you want to change];
}
After adding the custom CSS, click the “Save” button at the top-right corner of the code editor.
If you feel like my answer is helpful, please mark it as a SOLUTION. Let me know if you have any further questions.