Hi John... the recommended colour/conditioner to use is `Back2natural` available from adfhair http://www.adfhair.com/ ...they told me of a UK -supplier of this product and I ordered it before Christmas, but now when I click on the site it re-directs to a non-UK site so just send them an e mail and they`ll advise of the current/nearest suppliers to you ..the colour you need is ``Dark natural ash brown`` ...now, you mention grey hairs in your growing hair... you might be better to use a proprietary/ salon colourer product on those when you have the system de-bonded. The `Back2natural` is specifically for system -hair and great for giving a good colour-blend between growing and non-growing hair but not great for covering grey [in my experience] I`d take Xeon`s advice and wear a Swisslace front [inch or so] and the rest in the more durable French....Swiss is great for the exposed hairline you want and French will carry the `weight`more robustly. I`ll be doing a new Thread today of my new system --55% density - so it will give you an idea of what that looks like... cheers .. Paul.