Solved: How to remove borders on product preview?

Hey @SangyeMenla 

 

Follow these Steps:

1) Go to Online Store
2) Edit Code
3) Find theme.liquid file

4) Add the following code in the bottom of the file above </body> tag

<style>
.product-list .thumbnail img, .slider-gallery .thumbnail img {
    background: white !important;
}
</style>

RESULT:

 

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Best Regards,
Moeed