Books like Madder red by Robert Chenciner

Darwin, a low‑rank Red on Mars, discovers a hidden ruling class and infiltrates the Gold’s Institute in a quest to dismantle a tyrannical society and secure freedom for his people.

In a world split by blood, a lowly Red named Mare Barrow discovers a hidden power that threatens the ruling Silver elite, forcing her into the palace as a fake princess while she secretly fuels a rebellion.

A war novel that follows Union private Henry Fleming as he confronts fear and shame after fleeing battle, seeking a symbolic "red badge of courage" and ultimately taking on the role of standard-bearer.

Nona Grey, a blood‑stained nine‑year‑old, is taken to the Convent of Sweet Mercy where girls are trained as deadly religious warriors. Under Abbess Glass she learns sword, mystic power, and confronts her violent past amid a crumbling empire.

In Victorian London, Sugar, a young prostitute, struggles to climb out of poverty while navigating the harsh social realities of the era.

In the corrupt town of Poisonville, the Continental Op battles gangs and brute violence to avenge the death of the last honest citizen, revealing the dark underside of the American grain trade.

This book recounts the colorful history of cochineal, a legendary red dye that was once one of the world's most precious commodities. Treasured by the ancient Mexicans, cochineal was sold in the great Aztec marketplaces, where it attracted the attention of the Spanish conquistadors in 1519. Shipped to Europe, the dye created a sensation, producing the brightest, strongest red the world had ever seen. Soon Spain's cochineal monopoly was worth a fortune. Desperate to find their own sources of the elusive dye, the other Europeans tried to crack the enigma of cochineal. Did it come from a worm, a berry, a seed? Could it be stolen from Mexico and transplanted to their own colonies? Pirates, explorers, alchemists, scientists, and spies--all joined the chase for cochineal, a chase that lasted more than three centuries.--From publisher description.