I own a 1971 Land Rover Series III, The color is light green and I believe at that time there were only two varieties of the green color. I'm looking here for the light green color code, If anyone could help me with it I will be really grateful.

 

Try these (Rovers North ) points:

Land Rover Paint Code Tips


These are general descriptions of the actual paint codes for each different manufacturer. Supply this chart to your body shop for correct matching.

Dupont Code
Bronze Green 38500A
Pastel Green 38504A
Limestone 38505A
Poppy Red 38506AH
Marine Blue 38503A

Glasurit
Bronze Green LEY637
Pastel Green ROV605
Limestone ROV105/S
Poppy Red ROV303
Marine Blue ROV504
Sand ROV106

PPG Deltron Code
Bronze Green 46451
Pastel Green 46250
Limestone 46251
Marine Blue 16514

Also, many modern auto paint distributors have a color "scanner" that they can point at your paint to produce an exact match.