Each Jaeger regiment has a signature color that dominates its paint scheme. The Alarion Jaegers use gray with a distinctive white checkered pattern overlaying the left side of the 'Mechs and vehicles.
Per FM: Lyran Alliance, page 48.
The Alliance insignia appears on the right torso or side of each unit, beneath which is the Jaeger symbol: a hunter's recurve longbow suspended before a moon set against a sunburst bearing a five-sided shield. The moons differ in color and size to represent those of each provincial capital. The moon is purple for Alarion. Per FM:Lyran Alliance, page 48.