To keep formatting the same as in cells on the left, czhange all forumulas in the rules in following manner:
The above is for red, but once you change it, you will notice "" cells will become orange, so use similar ammendment to other CF rules too. (see red marker on a screenshot ORAZ is equivalent to AND in my locallized version of Excel)
To change formatting to Light gray (I don't think you ment it writing "return a neutral fil'", but just in case ...) add new rule with formula:
and make sure it's topmost rule (blue marker on screenshot)
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