Hello, Safe Desires,
Thank you for reaching out to us with your concerns.
1/ Do you mean the main images gallery on a single product page? It depends on column width, for example – https://prnt.sc/-fbivlrXrck0
You have a few single-product templates, so check the settings of others too, or let us know which one should we test for you.
2/ Concerning the template customization, we have tested one of your templates as shown here: https://prnt.sc/48-s97SYf8Ah. To change the color of the image, you will need to use a different image, as the settings for default icons do not allow color adjustments for images. This is not a theme problem.
Should you require further assistance or have additional questions, please do not hesitate to contact us.
Best Regards,
8Theme’s Team