How to make such a substrate for Yandex maps?

Question

Yandex maps

how to make such a substrate + was the possibility of an interactive map?

Answer 1

[class*="-ground-pane"]
  filter: url("data:image/svg+xml;utf8,<svg xmlns=\'http://www.w3.org/2000/svg\'><filter id=\'grayscale\'><feColorMatrix type=\'matrix\' values=\'0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\'/></filter></svg>#grayscale")
  -webkit-filter: grayscale(100%)