Does Kefura red ki means something more?
Well, Kale's ki was shown to be green in color during her transformations, when she transformed to her Berserker state and mastered LSSJ state. Also, Caulifla had a Ki base attack which was red in color. Kefla is a fusion of both Caulifla and Kale, so I wouldn't really think much of it. The colors don't really represent anything.