Sage green.
We painted it when I was pregnant with ds1 and he's 21 now.
I repainted the hall, landing, and as far up the stairway as I could reach with the left over paint about 11 years ago.
It desperately needs redoing, but I want a colour change (have since had a sage green kitchen which I love, and painted the conservatory a minty green - so want something different) but have NO IDEA what colour to go with.