Use and edit these to your requirements. If you want the asari or clothes in another colour, you'll have to recolour the texture files, as I've used default textures except for removing Cerberus/N7 logos, and complete overhauls for the long dress and the work gear. I recoloured those because they were a strange colour; I've included a PSD for these, so you can get the original textures if you want them. Or you can look through my useful texture gallery: sdrv.ms/13jBUUD
The whole texture can really make a difference. Like if you want a different asari face shape for an OC, you can use Samara/Morinth or Aria with default textures which will make the face look different and varied.