What colured spot light is matching for ivory coloured wall

I'm sorry for the delay in responding to you.

This particular forum is focused on the electrical systems for lighting, not the decorative side.

The suggestions I have would to be to really contact a decorative lighting consultant or maybe an interior design consultant.

There are several variables to be concerned with. For example, do you want to wash the wall from above or below or do you want to hit the wall with spotlights.

Are you trying to soften the wall covering (in which case you would use a diffuse soft white lamp) or are you trying to paint the wall in another color?

I know that I am out on my league with color matching, heck, during my career with IBM I was fortunate because it did not matter what tie I selected to go with my white shirt!