I personally can get a slight color change with Ilford MGIV RC in selenium 1-9 for about 6 minutes @ room temp, 72F. It gives a slight change over to a purple brown, but very slight. If compared to a untoned print it is obvious but not dramatic. If you were displaying it with prints processed in a similar way you would not realize any toning was involved.

If you are trying to avoid toning RC, I believe Sistan is a better treatment for archival purposes.