Necrons: Canoptek Spyder Genestealer Cults they sport immense beards and

they sport immense beards and feature mohawks poking through their ornate drake helms

would look great with this colour

The Repulsor has a choice of:

A rich purple suited for a multitude of purposes

Additionally

Necrons: Canoptek Spyder Genestealer Cults they sport immense beards andWhen it comes to ferocious mechanical constructs, you can't get much nastier than a Canoptek Spyder. If it isn't tearing apart enemy infantry or tanks with an array of hooks and blades, then it can be used to repair your damaged vehicles. The icing on the cake (or the chip on the circuit board whatever the Necron equivalent of cake is) is that, even in the heat of battle, it can spawn Canoptek Scarabs to boost your war efforts and irritate your foes.