عَهْدِي بِهِ مَدَّ النَّهَارِ كَأَنَّمَا خُضِبَ الْبَنَانُ وَرَأْسُهُ بِالْعَظْلَمِ
I remember him through the day as though his fingers and head had been dyed with the dark blue substance called ʿaẓlam.
Madda al-nahār indicates the length of the day. Khuḍiba is passive, and al-ʿaẓlam names a dark-blue dye plant or pigment. Colour serves to intensify the bodily aftermath of combat.