The shade of red she is wearing is even nicer but, of course, that might be a trick of the light due to the differnt fabric.
From the shadow on the record officers chair, the principal lighting would seem to be behind Shaw. Also, if the costume she is wearing was special made just for this episode, it might not be faded from repeated washings.
I'd love to see the man in the gold minidress if anybody has the pic.
That should be the title of the next movie.
Star Trek Thirteen: The Man in the Gold Minidress.