There are many synonyms that could be used to describe the phrase "boy brushed red living in black and". Some possible alternatives include "youth painted crimson dwelling in darkness and despair," "adolescent tinted scarlet existing amidst somberness and gloom," or "lad coated vermilion cohabiting with obscurity and melancholy." Other options might include substituting different colors or variations on the terms used, such as "lad with a scarlet blush living in a world of shadows" or "young man painted crimson struggling with the darkness of his surroundings." Ultimately, the synonym chosen will depend on the writer's desired tone, style, and intended message.