You can buy a suede stone and just gently rub the toe of the boot. That should lighten the toe a bit. I used it on our leather couch to take out dark stains and it really worked remarkably well. Just test in on a little area first.
< member since 2006 (no idea where 1969 came from ).

Medium/high porosity; color treated; medium density; medium; 2c/3a; chin length.
Daily co-wash & Leave-In = Suave Naturals Juicy Green Apple conditioner.
Every other day protein conditioner (before leave-in) = Aubrey Organics GBP conditioner.
Styling (high dew point) = Aussie Instant Freeze Gel; (low dew point) = SM Curl Enhancing Smoothie.