Pretty much the baseline concept I would guess! But the skin-tone and the white glowing eyes does match well with my first-impression on what a quarian might look like unmasked However.. there are certain mods that introduces Tali's face with way better rendering!
with this we can clarify that she has glowing white eyes (with a nice shape to them), and a slim face. However the skin tone in my oppinion isnt purple, I think she would be very pale of a light colour (seeing how there in there suits there hole life they cant get sunrays.
You idiots, that's not actually her face. Bioware designed the face behind the mask to maintain the shape of her face, to keep it looking like a silhouette. If yu think that's her actual face, do some research. ._. -facepalm-