I though that the Balmer series was the spectrum of visible light part of the EM Spectrum and, as such, there is an infinite array of colours present?
But, I'm reasonably sure that the HSC exam won't have a question asking us to play with coloured pencils.
To answer a question like:
"Perform a first hand investigation to observe the visible components of the hydrogen spectrum"
you would say what parts of the hydrogen spectrum are visible, I believe. Actually I'm not sure.
Hang on, this is a "Perform a first hand investigation" dot point. You'll most likely be asked is either what you observed (in words), or what you did, or what the point of the exercise was, or all three.
If you are really stuck, ring the HSC hotline (if it exists this year) or ring a random nerd in your school (or aquire your teacher's phone number so you can contact them at any time ...like say 3am)