اِحْمَرَّ
Translation: It turned red.
اِحْمَارَّ
Translation: It became intensely red.
The text identifies intensification as a shared characteristic of the discussed patterns.
QuestionType of answer
Color?Domain of the quality
Intensification?Degree of that quality
Intransitivity?Syntactic relation to the subject
Do not confuse a color category with degree or with transitivity.