http://www.mbrepository.com/file.php?id=1770&posted=true#c_7173
This mod is simply a recoloring of the factions back to the old native way. This mod was created in Warband and may not be compatible with lower versions (Given its simply one file with the Sarrinid Faction implemented I'd assume no.)
For this mod in general I tried to choose more vibrant colors with less blandness. They aren't neon, but are more subtle powerful hues. For example ingame the Swadian Orange looks almost molten, the Vaegir's green is a forest hue, and the Kherjit Purple is more bold.
The Coloring as of Warband:
Vaegir - White
Nord - Cyan
Rhodok - Green
Swadia - Orange
Kherjit - Purple
Sarranid - Yellow
Recolor Mod:
Vaegir - Green
Nord - Yellow
Rhodok - Cyan
Swadia - Orange
Kherjit - Purple
Sarranid - Sandy Tan
Screenshots: (These are Jpegs, they really don't do the colors justice)
http://img.photobucket.com/albums/v722/Ebonyassassin2/swad-vae-nord.jpg
http://img.photobucket.com/albums/v722/Ebonyassassin2/kher-rhod-sarr-1.jpg
Installation:
Copy this file into your module of choice (Back up your old factions.txt) and vula, please do note however that you MUST start a new game for these changes to take effect! (However I have not tested a world reload to see if they'd work then.)