Cheating a gradient!
Usually, you can achieve a decent gradient by just blending two colours over wet paper, but sometimes you can paint yourself into a bit of a corner, or simply change your mind and realise that you need to rework an area.
Here’s a two-colour blend using a wet brush on wet paper. It’s fairly easy and looks best when done when you leave it alone and let the paint do its own thing. The main drawback is that this doesn’t allow for a huge amount of control. Traditional
Here’s a cheat gradient that I did using a small liner brush. I worked from top to bottom in increasingly more opaque layers, squinting to check my values. The main drawback is that you automatically lose some vibrancy when layering over a darker colour. But this technique can be pretty neatlooking sometimes! Cheating