“If something’s broken, it stays broken,” intones Bo (Lorraine Toussaint) at the outset of Fast Color, which then proceeds to show that things – and people – can be mended through the power of family, love and connection to the past. Director Julia Hart’s sophomore feature (co-written with Jordan Horowitz) is an unconventional superhero saga about Ruth (Gugu Mbatha-Raw), who in a near future decimated by lack of rain, flees government agent Bill (Christopher Denham) while trying to control her extraordinary abilities, which manifest themselves as seismic seizures. Ruth’s flight takes her to her childhood home and her mom Bo (Lorraine Toussaint) and daughter Lila (Saniyya Sidney), both of whom have the capacity to wield swirly-colored constructive/deconstructive energy. The volatility of youth and the vitality of kinship (with present and former relatives) serve as sturdy thematic undercurrents for this low-key genre tale. Far more subdued than its summer-blockbuster brethren, it’s a showcase for Hart’s vibrant visuals and Mbatha-Raw’s heartfelt performance as a woman finding strength not from independence but, instead, from bonds of blood.