Photoshop :: Using Pen Tool For Colord Curves

I have a question about the pen tool in Photoshop, I would like to make drawings as a simple colored dividing curves I found no simple way to achieve this, first found solution is to trace with Tool pen the desired shape (open form), then using the Layout panel, apply a color on edge, the problem with this method is that if you change the shape of the trace thereafter, the initial color persists mena sdoesn't move withe resized trace and it's embarrassing. the second found solution is to use a vector layer, but the problem is that traces are always closed(means closed shaps only) and the colored outline is applied on all around the shape , it works well with the closed form but not with the simple forms.

how to draw a single line or an open colored curve with photoshop.