Use /rawsettings Color=...
https://winscp.net/eng/docs/commandline#rawsettings

If you configure the color on the Login > Advanced, you can then go to Login > Advanced > Edit Raw Settings and see the Color value.
https://winscp.net/eng/docs/ui_login_advanced#color
https://winscp.net/eng/docs/ui_login_raw

Hi,

I'm starting sessions from the command line, without having them saved within the program itself.
I would like to be able to set the color as well from the command line.
I'm talking about the colors that are usually set from the ui from the "Tabs > Color" menu item

Thanks