I think it would be dark which ever canvas colour was chosen ,its thicker fabric than I thought , be ok in the day with window covers open, but thinking about kids up in the roof bed, will have to have to temporarily rig the touch sensitive lights up to see what best option to go for, bit of trial and error.
Oh davey b measured from kombi rubber floor to ceiling today 53" so should give you some idea what headroom you have to play with you being a lanky bugger at 6,5