[Orgmode] Changing way hlines in tables are exported?

[Rainer Hansen]

Hi,

I wonder if there is an easy way to change the style of the "exported" hlines 
in tables. This should not only be possible per table but per single hline, 
e.g. the first hline should be thick and in blue, the next two one are 
ordinary ones and the third should be thick and red. This should be possible 
for HTML, LaTeX and other export formats.

Regards,
Rainer