Admin Action extension Polaris Web Components

[BotondV]

How would you achieve this UX in an Admin Action extension using the new Polaris Web Components?

A grid of image thumbnails, and:

1. When you hover over an image a semi-transparent overlay shows
2. You can click the given item.

Additionally: can I set a custom color for the image border? I know it is not recommended, but it is not even possible?

Thanks.

[BotondV]

@Liam-Shopify Can you help me with this? Also with the additional question. I would really appreciate it.