Another theatrical makeup question

Had dress rehersal last night only to find out that there is an actor with a LARGE port wine stain over maybe a third of his face that they would like me to cover up. Obviously don't have time to order any makeups designed for that. Anybody got any good tricks in your bag for that sort of thing. I only have three shades of Ben Nye cake foundation ranging from light beige to tan male - can't remember the shade in between. Thinking of hitting makeup aisle for a yellow toned corrective concealer but not sure if there is a better way.

For theatre you can simply apply a heavy layer of foundation and powder it. If the mark is still visible apply more foundation in that area, and powder.

It usually will be enough. When the lights hit the make-up it reflects the make-up, not the underlying colour.

Dermablend if you can find it. Rite-Aid carried it at one time.

Thanks guys. No Rite-aid here maybe look at Walgreens. When I simply tried the foundation and powder last night Shannon it toned down the color but still didn't look "right" Suspect because his skin there is raised and unevenly textured. I did a pretty good job - his kids said they didn't recognize him when he came out of makeup cause I had aged him and covered his birthmark as best I could. Just want to do the best job I possibly can.

Use a foundation shade 2-3 shades darker than what you think is a match...

You have to remember that texture and slight variations in colour won't read from the audience... theatre is very forgiving.

Did you go out into the house to check it on stage with the show lights on, NOT the house lights, but the stage lighting?

Yes, we had a full run through. I went to the back to evaluate my "work"
I may be being overly critical of myself since this is my first foray into theatrical makeup. Will take pics before and after tonight for a more experienced critique. Again, thanks for the help. Forum members are AWESOME!