DSF

Im running a Epson A3 WF-7015 that I bought with reset carts and a load of ink, unbranded
Now I'm happy with the colour but it could be better so my question is what ink should I be looking at to refill the cart's

To get the best colour you need a custom ICC profile.
If you haven't already got this, then this should be your next step.
If you have done this, then you need to get the exact same ink as you alread have or you'll need to get a new ICC made.

Yep that would be the way I go if I knew where the ink came from that I have now
With it being unbranded I'm thinking just get some new ink and then a custom ICC,
This way I only need to sort one custom ICC,
but on the other hand I do have over 150ml of each ink already