inactive_bg_color_offset option

[Jon Oster]

This is a "wishlist" item, not a bug report. Apologies if this was the wrong place to do this.

It would be nice to have an "inactive_bg_color_offset" option in the config file. I use a light colour scheme with dark fonts, so multiplying the font colours doesn't actually tell me much of anything. If I could dim the background colour of the inactive tabs, though, it would be a very useful visual cue.