I use 1/3 wholewheat (stoneground) to 2/3 plain (strong) white. Occasionally I'll use a malthouse flour for flavour

The other thing you can do is add a T or 2 of wheatgerm - I find this mix makes a loaf a bit like a "best of both" (if you have that there) - not so brown the kids go "errgh", not so white as to be pappy

Making your own is healthier anyway than bought sliced because of no additives, so you don't need quite as much brown to be healthy