Unfortunately I didn't have a tool to make life easy for everybody, i just hand edited the xml file and made 5 versions, each with a different number of rows. Then made an installer for the skin and made the number of lines in the epg one of the choices in the installer.iirc Boilermaker had a tool to adjust the values for the old B2 16:9 skin
the first two hex chars are the opacity the other 6 the usual web colour palette.
e.g. ffffffff is full white, 80ffffff is white with a little opacity, ffd3d3d3 is "lightgray"