I think it's a great idea but I'll be in the minority. Acorn is quite flat and artificial looking in my view. The addition of some darker tones, particularly on the toe cap can only improve it for me. If you don't like the result, reach for the renomat.Thinking of experimenting with my Stows in Acorn and darkening them with some Saphir Medallion polish in dark or medium brown. Talk me out of it?