You can combine them with mix rgb node or a mix shader node, for this task I'll reccomend you to use mix shader node just plug both the colors/textures in a principal or shader you think is more preferable and combine them, now for the next part you can use a gradient texture with mapping node and object coordinates and plug it into the factor input( you may need to inverse it for that just invert the order of sockets you have plugged into mix shader, the lower one in upper and upper one in lower), now you can use a color ramp to tighten the gradient as per your liking and use mapping node to move or rotate it, you can even add a noise texture in middle of mapping node and object coordinate to make a random coming ash on paper.

Few actions would do more to fight chronic diseases such as cancer and cardiovascular disease that greatly undermine health in the United States and that the incoming administration has indicated should be a priority to address. It was during President-elect Donald Trumps first term when the FDA which has authority to regulate tobacco first publicly discussed a plan to limit nicotine levels
Leaving Buckle? She smiled, slow and tired
The combination of high capacity and a wide flavour catalogue is what sets it apart from smaller, shorter-life disposables
Thats only a sample
A villain's natural environment In sequence 6, a female voice rambles about the stolen puppies in a mock empathic voice