I don't know how to post pics but i have done several neutrals like this. I find that you need a mix of various shades of ivory with white. Take care not to incorporate any tans..as tempted as you may be. if you feel you need tan, opt for a palest yellow instead. there's a tendency to want to "add" a bit of color and that can be risky sometimes. at the same time, 4-5 true whites will lose the effect you want also. its tricky to get right and even if you do wind up w/ one too dark or others to closely related, the result can still be lovely.