Traits

Dual Tone is more of a modifier than a marking which affects either a marking or if a standalone marking, it will only affect the base coat colour. However, should you have markings, you can make this modifier affect bother the base coat and markings. As long as this marking is present in the pups geno, you can apply it to any and all markings should you wish. There are only restrictions with this marking if it states it within the other marking guides. 

You can either use darker or lighter with your gradients. The gradient mainly consists of linear or radial gradients, however you can mix and match. 

Below are some examples of Dual Tone affecting the base coat alone and also some with modifying the markings. 

[Examples]