red face test
Definition from Wiktionary, the free dictionary
- (idiomatic) A hypothetical test of a person's embarrassment, that is either passed or failed. Saying one passes the red face test means one would not blush and thus would not be embarrassed by disclosing something to others or doing something, and saying one fails the red face test means a situation would cause them discernible embarrassment.
Usage notes 
This expression is often used when discussing college children's behaviors (http://www.academictips.org/acad/first_y_i_c/listentoyourinstinct.html) or "first blush" impressions in a business context.