That's how it was with Night Lilies. I had two goals in mind - discovering whether Tombow Fudenosuke brush pen ink was waterproof, and trying out Saunders Hot Press watercolor paper.
I started by doing this line drawing. using the Fudenosuke brush pens. No problem there.
The ink didn't smear. It was just dark enough to create a visual combination unpleasant to the eyes. Lesson learned. When you mix colors, you have to be careful to choose the right colors - whether you mix the paint in the palette or paint one color over another. Same thing when painting over ink.
I continued painting, hoping I could reduce the mud, and finally decided the answer was to add more ink. I think I did improve things, but the result is very dark.