It’s is back painted glass. As a back splash it can be used as it’s easy to clean and maintain. Highly recommended to be toughened. The entire back needs to be cladded in waterproof plywood and then the glass is stuck on to it with special adhesive or silicon gel. Any reservations on using plywood then you can opt for WPC ( wood plastic composite ) which is alternative to play and is totally termite-water proof.

SUBWAY TILE BACKSPLASHES With an aesthetic that is both classic and modern, bathroom and kitchen subway tile is one of the most popular trends on the market. its universal appeal stems from its simplistic design with plain color with punch design  and an easy to clean, durable surface that reflects light to brighten your kitchen or bathroom. Traditional subway tile with different design and color

Greetings from Dream Design, As per your inputs we suggest some ideas -Don't go with too dark backsplash as it will make the kitchen dull after some time and kitchen will look smaller -You can go with marble/tile or even the same counter top like quartz if you use in counter top you can same also put in backsplash as currently it's in trend -take white color with some black/grey lines marble or quartz -or you can go with white designer lines with grooving Sharing some reference pictures

Hi Nikhil... u can fix back painted glass as per your color n choice n fix on existing tile . if Budget is the concern, u can apply film on the tile .