Depends on how you look at it. With lower lighting, it looks Millennium Jade. In brighter light, it looks more Silica Breath. I'd say if you bought a V-Spec II Nur in Millennium Jade, the Engine Cover would be Millennium Jade. If you bought a M-Spec / M-Spec Nur in Silica Breath, the Engine Cover would be Silica Breath. I think Millennium Jade is a Pearlescent colour with Silica Breath, where as Silica Breath is a colour on its own.