Hi
I think evap lines are colourless, grey or a bit like a shadow. Normally HPT's have either blue or red dye so that should be the colour you are looking for when testing.
If you look on the fertility friend website, it shows pics of evap lines.
But if you have a pink line, that is a
If in doubt, get a clearblue digital as that will spell it out for you.
Good luck
xx