So thishttp://xdaforums.com/lg-g3/themes-apps/mod-gwbt-theme-g3-tweaksbox-themes-t2852754 works fine but "Enable Theme mod" has to be off for it to work would be nice if you can fix that for the next release. I'm current on the Sprint variant. And if its been discussed before and someone found a solution, please let me know. But pretty solid app so far
Theme MOD does not has to be OFF. Simply options have higher priority: if you want to use theme UI just set relative options to stock(like quicksettings toggle color). You could,for example, use the Theme UI for the quicksetting setting the toggle color to stock but still have custom brightness slider background. For each option in G3 TWB when you have a custom theme enabled:
Stock---------------->Means use theme resources
Any other value--------------->Ignore theme and use my color