BO4 - what part of css controls table heading colours (background and colour of text)

Hi,

Using BO4 SP6 and trying to chnage the colour of the cells in the css on the table header (bothe the colour and backkground-color.

css not clear exactly what chnage to do thois as loads of bits referrring to table headers.

anyone know?

webidefaultstylesheet.css by the way in images folder chnaging.

Thnaks