pegasusca's Profile

Tape on both sides so that one inch of each color is exposed. Now lightly spray paint a transition color in the two inch wide area, lightly enough so no paint runs.

This turns a mistake into a design element.
On the section where you had blue/white,
you now have blue/light blue/white
the light blue area being a two inch wide stripe

or dark grey/light grey stripe/white

definitely easier than repainting with a small brush and better looking as well

have fun