Board Thread:Support Requests - Getting Technical/@comment-25523075-20150612124831/@comment-303594-20150612131842

No. You will need

.hello defines a class - which is basically a group of rules to apply to everything in that class. To give the styles defined in the class, you need span class = "hello", not span style.

Span style is for adding rules for that element only. You have to write the rules out in that case.