https://bugs.winehq.org/show_bug.cgi?id=48233
--- Comment #4 from ryampolsky@yahoo.com --- Funny. Having disabled the theme - and then re-enabled it, the darker shadow color is now showing up under both 32- and 64-bit WINE. There must be something wrong with the theme file I'm using.
But I think it's the same 'Ubuntu light' theme that I had originally enabled. I.e., I simply picked it from the pull-down list on the winecfg 'Desktop Integration' tab to re-enable it.
I had originally enabled this theme years ago in my plain .wine WINEPREFIX, and only recently set up the .wine64 prefix. So, maybe the code to *apply* the theme in WINE is what's messing up. Again, the shadow color in WINE32 *used* to look right, but now it looks too dark in both WINE32 and WINE64...
I guess it's possible that when I re-imported the theme to set up .wine64 I pulled in a different theme file, who knows...