reflect well, badly, etc. on somebody/something

reflect on (someone or something)

To stand as evidence of someone's or something's qualities or merits. The principal seems more concerned that the incident will reflect poorly on the school, as opposed to whether anyone was hurt. Your poise under pressure really reflects on your ability as a leader.
See also: on, reflect
Farlex Dictionary of Idioms.

reflect well, badly, etc. on somebody/something

make somebody/something appear to be good, bad, etc. to other people: This incident reflects badly on everyone involved.
See also: on, reflect, somebody, something
Farlex Partner Idioms Dictionary
See also:
  • reflect on (someone or something)
  • show (someone or something) up as (something)
  • show up
  • show up as
  • a track record
  • on present form
  • a nail in somebody's/something's coffin
  • a ragged colt may make a good horse
  • colt
  • ragged