that's a tricky one. mabye Peter can help...
Use nested styles:
1: [None] up to 1 :
2: <your char style for em space> through 1 Em Spaces
The reason is that in order to use a grep style for the space after the colon, you'd have to be able to match a variable-length lookbehind. And you can't do that -- not realistically in your case, anyway.
Hi Peter, Marijan and All,
Its working fine
Thank you so much....