Finally i figured it out
[
^]. Using an embedded or external css style will not work.
Observations
CSS must be inline
CSS must be on th or td elements of the table because they represent CELLS in excel(This is what problem with me)
Colors should be HEX
SUMMARY From the above code, i dont need an external css style. All my css styles need to be inline in the table
There could be more to be observed. Please if you note any, please share!!!! Thanks.