Hi Christopher,
I don’t usually work with Houdini and you also didn’t specify the renderer you use.
But in the simple case of rendering an object with a RGB color value of 0.5/0.0/0.0 will result in a EXR render with the same color value - no matter how you set your color-pipeline.
The view result will differ, because the view transform is different and the scene linear values actually mean something different in a different colorspace.