Black and Off-White in Lightroom?

[schroetr1]

My wife has some silhouette cut-outs of our children mounted on an off-white background. I was thinking that some black-and-whites of the kids mounted in the same area would be really nice, but the white and off-white just don't look that good together.

Does anyone know of a way to create an off-white version of b/w photos but still with true blacks? (Everything I've seen appears to start with a grey-scale and then adding some hue that makes the blacks change color, not so much the whites.)

Any suggestions would be appreciated.

[MicWayWal]

Troy,

I would try using Channel Mixer. It gives you control of how white the whites will be as well as how black the blacks will be.