صِبْغَةَ اللَّهِ وَمَنْ أَحْسَنُ مِنَ اللَّهِ صِبْغَةً
The coloring of God—and whose coloring is better than God's?
In the interpretive context treated here, ṣibghah responds to a known religious use of “dyeing” or immersion as a ritual expression. Divine guidance and faith are then expressed with the corresponding term. It is not a claim about applying physical paint to the body.
On this reading, the figure is implied mushākalah: the associated practice or expression is presupposed rather than necessarily stated in the same sentence. The context is therefore essential to the rhetorical analysis.