Why does mrs.brown always were black in the book Elijah of buxton?

In "Elijah of Buxton" by Christopher Paul Curtis, Mrs. Brown wears black as a reflection of her mourning for her lost children. Her choice of color symbolizes her deep sorrow and the impact of slavery on her family, highlighting the themes of loss and resilience in the face of adversity. Additionally, her attire serves to remind the community of the pain that comes with the struggle for freedom and the sacrifices made along the way.