#964 Box: Update background color of warning box.
#964 Box: Update background color of warning box.

atma/chico,vrleonel/ml-test,vrleonel/chico,vrleonel/chico,mercadolibre/chico,vrleonel/ml-test,mercadolibre/chico,atma/chico,amireynoso/uxtest,amireynoso/uxtest