Medieval knight in armor with blue cape on battlefield near castle

A majestic watercolor painting depicting a medieval knight in full plate armor, holding a sword and an ornate shield. He wears a dark blue cape and a blood-stained white surcoat. In the background, a formidable castle stands amidst battle mist, with an army in the distance. The predominant color palette includes gray, blue, white, and red, creating an epic and dramatic atmosphere.