Color as a Semantic Characteristic

Final Characteristics of Derived Forms: Ifʿīlāl, Ifʿilāl, Faʿlala, Tafaʿlala, and Related Patterns

اِحْمَرَّ
Translation: It became red.
اِشْهَابَّ
Translation: It became very white.
Both illustrate the characteristic of color. The second example also draws attention to intensity.

VerbCore domainExtra point
اِحْمَرَّRednessBecoming red
اِشْهَابَّWhitenessPronounced degree

First identify the color quality; then ask separately whether the construction conveys emphasis or abundance.