Why did everything black turn purple

https://preview.redd.it/fzgi2h2l1q0h1.png?width=1920&format=png&auto=webp&s=cefad44db581a06599be2e521162c75fd025c011

https://preview.redd.it/5oixkfvl1q0h1.png?width=1920&format=png&auto=webp&s=b3d5f3e434be45ba4c740130800e886a259ff613

i was just getting buckets from my inventory to fill up my foundry and the black foundry bricks and all the shadows just turned purple i dont know what i did to make this happen. anyone know how to change it back?