Wouldn't that be...
...alkaline?
I seem to remember red/orange as acid and purple as alkaline
(
Just Juan Cornetto will take you to the lo-rider show n' flaunt ya on,
Fri 15 May 2009, 14:00,
archived)
yes, if you're doing the 'classical' litmus test
DTH on the other hand surely uses a far superior indicator with a different color scheme ;)
(
pzyko Query failed.,
Fri 15 May 2009, 14:09,
archived)