A little issue with the schemes, typing:

/color 1 660690 (or any colour command/parameters)

Then accessing the colour dialog, ALT+K reverts all colours back to the scheme selected; doesn't even give you the chance to press cancel to revert to your settings.

maybe because you are using a 1 as the scheme name?

this is the first thing i noticed upon testing the new schemes.

the solution is to create a new /color identifier that changes the color, then adds a new entry (or perhaps modifies the current scheme) in mirc.ini, then doing /color -l to load the new scheme (or modified scheme), then doing /color -s "scheme name".

however, that is just a workaround and it would definately be easier if mIRC would just update the current scheme with the new value automatically.