Citadel Base Naggaroth Night is a very dark purple - named for the city of Naggaroth in the dark Elf aesthetic and calibrated for the deep, corrupt purple associated with Drukhari Kabal colours, Slaanesh daemon schemes in dark interpretations and any model where purple should read as nearly black until highlights bring it to life. It covers strongly in a single coat over dark primer.
Apply as the foundation for Drukhari armour in dark purple Kabal schemes, Daemonette skin in dark interpretations, Emperor's Children armour where the scheme should read as a very dark purple rather than mid-tone, and the robes of Chaos Sorcerers and Thousand Sons elements where dark purple provides depth under blue highlighting.
The darkest purple base in the Citadel range - nearly black until highlights are applied. The dramatic contrast with subsequent purple and lilac highlights makes finished purple schemes particularly vivid.