How can I make light not affect my particle system

I have a particle system and a blue light next to it and the light is making the particles blue. how can I make the light not affect the particles so that they stay the color that I put them? Thanks

There ae several ways, One is to put the light on a layer with the other objects you want the light to affect, and put the particle system on it’s own layer. Then select layer in the light properties.