Honestly, you`re over-stressing..... I`d be totally honest if I saw a ` difference` but I do understand your concerns. Digital / flash images always ` amplify ` the slightest flaw /difference...many of my pics look ` off` but in reality, it looks fine [and I`m VERY fussy` ]
Your care-routine so far is fine..... you could get yourself a bottle of ``Back2natural` colour-conditioner..... it`s great when a system is new, for helping iron-out slight colour -differences......however in time to come, once oxidation from sun-exposure / washing etc. sets in, off-the-shelf colour products may be your only choice -- you can get them in pharmacies/supermarkets etc.
You`re self-conscious now as a new wearer [we all are /were when we started or get a new system]--- no one is looking at your hair with a digital camera / flash ........... sometimes too, flourescent lighting or certain lighting in places like night clubs, can show differences between growing hair and system hair....... I think you`re in UK ? Here`s a link http://www.back2natural-uk.co.uk/ the one you want is dark natural ash brown....it helps with the blend-in between your growing hair and the system....it`s got a conditioner too. Hope that helps you !