Why does my video look washed out after render?

Why does my video look washed out when I render in a format other than targa,png, and jpeg.

Dpx, tiff, sgi, openexr, cineon all look washed out.

I want to understand why thanks.

What bit depth is your source footage?

What bit depth is your Silhouette session?

Are you determining that the rendered image is washed out within another program or within Silhouette?