How do i make the final price on products a bigger font and maybe a different colour

Hello,

Thank you for reaching out to us.

Custom CSS code can be used:

.single-product .single_variation .price {
    font-size: 30px;
    font-weight: 600;
    color: #000;
}

https://www.8theme.com/documentation/xstore/additional-customisation/optimal-placement-for-custom-css-code/

Warm Regards,
The 8Theme Team

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The 8Theme Team