Conversation so far:
where is the esophagus located in the body
The esophagus is a muscular tube connecting the throat with the stomach
what's the length of the esophagus
The esophagus is about 8 inches long
where is the trachea located in the body
The trachea begins just under the larynx and runs down behind the breastbone.
where is the spleen located in the body
The spleen is located under the ribcage and above the stomach in the left upper quadrant of the abdomen

Question: what's the color
Self-contained rewrite: what's the color of the spleen