Reply To: French :)

If you want to paint Infanterie legere from the light box they all had blue trousers, But with coats invisible.

All the ones from Line box had White trousers, including the Grenadiers and fusiliers. Or replacements in other Colors, like Grey or Brown.

Give the the elite Grenadiers and Voltigeurs the shako with visible Cords and plumes in red or yellow/green and use for line fusiliers the covered ones.
With the Chasseurs of the legere you might use the gaudy ones too.