Should the brand colour match in the room and online?

Yes: the colour of the printed poster and of the story come from the same reference, the door, not from two screens. What looks bright on the phone can come out dull on paper, and it is closed with a proof. Compare the story and a printed proof beside the door. In the sierra the vinyl and the post do not look like the same venue. Both pieces keep the colour of the proof that does match the front.