
Livid
Intensity of Anger
Use 'livid' for extreme anger, more than just 'mad' or 'upset.' It emphasizes a very strong feeling. 
Not for Minor Annoyance
'Livid' is inappropriate for slight irritation or mild annoyance; it's for serious instances. 
Expressive Contexts
Use 'livid' when you want to convey a vivid image of someone's anger in storytelling. 