Prompting Verbosity Differences
This is an example of using prompt verbosity to more cleanly separate colors. The versions with the red hair have a lot of descriptive language that separates the red hair more strongly from the blue dress. The versions with the blue hair have shorter prompts and thus bleed more heavily.
Note that SD doesn't deeply understand natural language, so the primary effect is spacing and making the prompt resemble the training data better. Both prompts are built around the same key words.