The color scheme used on Rangers vehicles for parades is principally dark red, with arms (or turrets/rudders) painted black. The 4th adds green highlights.
Per FM: Lyran Alliance, page 100.
Commando, FM: Lyran Alliance (plate 7)
The Rangers’ insignia takes the form of a disc, upon which is a yellow sun in a blue sky, partly obscured by wisps of white cloud. The RCT’s insignia is a blue disc upon which is drawn in green the Terran island of Great Britain for which the unit â€“ like Ian McQuiston’s first freighter â€“ is named. Per FM:Lyran Alliance, pages 99 and 100.