Stained Glass is beautiful thing that Vintage Story does really well, however unlike other sandbox's the ability of chiseling allows some incredible possibilities. Been experimenting with the colored glass in my Creative Test World in the mixing of colors through layering glass planal. The maximum of layered sheets on a block is 8 Layer or 4 Pairs of color sheets. The window is using 2 pairing of colors sheets or 4 Layers using Blue Glass, Yellow Glass, Green Glass and little traces of Brown and Red Glass to produce a range of deeper and vibrant colors. The Colors you can make is Amazing even for simple looking window.
I got carried away when building a wall to go with it.