Find 12.2, how to use simpleVariables array in home/customization/style.json

[ciroppina]

Dear Sirs

I tried to override some "core" less variables in style.json as fiollows:

{
	"simpleVariables": {
		"@hpegreen": "#47695b",
		"@hpegreen-hover": "#62746c",
		"@hpegreen-active": "#71a992",
		"@disabled-color": "#EDEDED"
	}
}

but no override took place... what is the correct mode to use that style.json file?
[other than the example I can find in the Pdf documentation, page 60 "Change Highlights color"]

[ciroppina]

to be a little more precise: what is the correct way to use these (see pict) customization files?

The "Find_12.2_Administration_en.pdf" is scarcely explaining their use, by poor examples