"dadiOH" writes:
Red Green wrote:

Like to add, when touching up even from an original can, blend/fog by
running the brush/roller virtually dry way past the area being done.
Differences are harder to notice.

IME and IMO this is the best solution for the OP assuming that the new paint
color is pretty close. One can also feather out by diluting the paint.


Another good tip is too *wash* the entire wall. A lot of the mismatch
is due more to accumulate dust/dirt/grime than to actual fading -
especially indoor areas not exposed to lots of direct sunlight.