@dkbarnett It's so tricky!! - They are either so white that they are hard to see or so dark that they don't count!! I like your description of "subtle"!! :)
@olivetreeann Hi Ann - Thanks for your kind comment - I don't know quite what to say in reply :) I seem to try so many different things - only some of which seem to work. I was reasonably happy with this final result so it's very nice to hear your appreciation. Thanks again Cheers Rob