Hello,
Sorry to say but there isn’t a separate option available to do the required change.
Please try using the below Custom CSS code and paste it to Dashboard >> Theme Settings >> Custom CSS >> Global CSS section:
For the Sale Price color and font size change, please try this:
.price ins { font-size: 20px !important; }
.price ins .amount { color: red !important; }
For the Previous Price color and font size change, please try this:
.price del { font-size: 15px !important; }
.price del .amount { color: blue !important; }
Moreover, if you want to change the color of the Strikethrough line appearing on the previous price then you just need to add the color property in this CSS:
.price del { font-size: 15px !important; color: yellow !important; }
Hope this helps !
Best Regards.