Tutorial on colour, styles, themes etc?

["Oliver Elphick" <olly lfix co uk>]

Can someone point me to a tutorial on the use of styles, themes and colours?

The details available at gtk.org seem very skimpy, unless I have missed
something...

My particular task is to enable different text colours to indicate
information status, as for example which of a list of processes is the
one that is currently active.  Another is to set the pre-light colour for
certain text fields (in eventboxes, of course) where the right-button will
give access to a pop-up menu.

I understand that the direct use of colour-setting is deprecated,
because it might clash with the user's chosen theme.

-- 
Oliver Elphick                                Oliver Elphick lfix co uk
Isle of Wight                              http://www.lfix.co.uk/oliver
PGP: 1024R/32B8FAA1: 97 EA 1D 47 72 3F 28 47  6B 7E 39 CC 56 E4 C1 47
GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839  932A 614D 4C34 3E1D 0C1C
                 ========================================
     "But the wisdom that is from above is first pure, then 
      peaceable, gentle, and easy to be intreated, full of 
      mercy and good fruits, without partiality, and without
      hypocrisy."     James 3:17