Comment by juancn

I think it can be used as "non-objectionable" or "non-irritating" which would still work here

The harm considered here is being conspicuous. So you could make an argument for either term.

Innocuous also means inoffensive, which is apt here.

Innocuous means producing no injury or harm, or not likely to give offense or arouse strong feelings.

https://www.merriam-webster.com/dictionary/innocuous