How to correctly design/color icon to be visible across themes?

[NilkasG (Niklas Gollenstede)]

@rugkx

However as MDN says “You need to supply an ThemeIcons in size 16 and one in size 32 (for retina display).” (which, BTW, kinda is contrary to the statement that the key is “an array containing at least one ThemeIcons object”)

Yeah, the first part from MDN is simply not true. I always specify my SVG icons as

"icons": {
	"1": "/icon.svg"
},

and never had a problem with is (except that chrome can’t handle SVGs at all).