Concealer?

Just odered damn $32 bottle of concealer from sephora. Never used the brand before so the colors were all new to me. & its so hard to guage online!. Well i got it in the mail and it is slightly darker than my old concealer. very slight, do you think it would be super noticeable? I can't return it!! Have a huge event tomorrow.

Advice from anyone who does make up??