There should be a molded label on the side of your blaster that says what kind it is.
Not all of the Elite blasters have a blue color scheme for example the reskinned rapid strike is orange and accustrike darts are compatible with elite
The Stampede ECS, Raider Rapid FireCS-35 Blaster, and Longstrike CS-6 all take clip system darts or elites, and airstrikes The Barricade RV-10 and the Maverick Rev-6 take Whistler darts, but can also use Elite darts. The Maverick uses suction darts, but can also use Elite darts. The Nite-Finder X-3 uses glow-in-the-dark suction darts, but, again, can also use Elite darts. The Reflex IX-1 and the Jolt Blaster take Elite darts. The Nerf Modulus line, despite being marked as an N-Strike subseries, use Elite darts.