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I tried running Darktable (version 1.0.4-1~bpo60+1 from Debian Squeeze-backports) under Xfce, but I am using a fairly light "Style" theme in Xfce which Darktable didn't work too well with. It seems to do some magic to set specific colors in GTK/GNOME dialogs (the file open dialog for "import" being one example), and the two clash resulting in nearly unreadable file listings.

When I switched to a darker theme (I tried Xfce-dusk, but others worked similarly well), the colors aligned and usage was much smoother. However, I'd rather not switch to a dark color theme just for this one application, and I don't see any obvious way of switching Darktable to a lighter color theme.

I did find mention of the GTK2_RC_FILES environment variable (set it to the full path to a gtkrc), which seems to work for e.g. gedit (GTK2_RC_FILES=/usr/share/themes/HighContrastLargePrintInverse/gtk-2.0/gtkrc gedit works quite nicely and only affects that instance) but it does not seem to have any effect for Darktable. Since changing the global theme does work, there's obviously some way to make this work. So what other magic is needed?

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Try to edit /usr/share/darktable/darktable.gtkrc (system wide) or copy that file to ~/.config/darktable/darktablerc (user preferences)

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