Final answer:
Both crystal violet and safranin are basic stains that have positive chromophores and bind to negatively charged cell walls.
Step-by-step explanation:
Both crystal violet and safranin are basic stains.
Basic dyes have positive chromophores that stick to the cell walls of cells, which are typically negatively charged. Crystal violet and safranin are commonly used as positive stains because their positive chromophores bind to the negatively charged cell walls.