Re: Keep default bp theme but change main colors
Personally… I would go one step further and NOT make a copy of the css file from the default. I would just create a new custom.css file in the child and override individual declarations as needed. That way your theme should be more future-proof if the default theme ever gets updated. If all you want to do is override a few colors… you could probably do it in just a few lines of CSS code in child-theme/_inc/css/custom.css. You would have to import this new sheet from child-theme/styles.css. i.e.
/* Parent styles */
@import url( ../bp-default/_inc/css/adminbar.css );
@import url( ../bp-default/_inc/css/default.css );
/* Custom styles */
@import url( _inc/css/custom.css);