These are for decoration only 
On the custom you can choose the color of the resin, the line and the interior 
For example, on the shuriken 3, the line is black, the interior is silver and the resin is grey 
Please specify while purchasing 
Also , on the resin and interior color please specify if it is a light, normal or darker color. For example : light pink resin 
The interior part can also be colorless like in the Shuriken 1
You can also ask it to be without glitter. There's two glitters: the bling shaped one and the shimmer one , please also specify which one you want / don't want 
If you don't specify the glitter I'll add both