Final answer:
The stroma is the colorless fluid surrounding the grana within the chloroplast, where the light-independent reactions of photosynthesis occur.
Step-by-step explanation:
The colorless fluid surrounding the grana within the chloroplast is known as the stroma. The stroma is the fluid-filled space that surrounds the thylakoid stacks or grana in the chloroplast. It is in the stroma where the light-independent reactions of photosynthesis take place.