Particle System Color Not Working

I have a very rudimentary particle system in my game, but the color of my particles isn't what I told it to be. Rather than the color I specified both in the starting color and color over lifetime, my particles are a vibrant pink, similar to the generic missing texture pink, like you see on a pink and black checkboard. I don't think the specifics really matter, but if they do I can provide more details. I figure a texture is missing but don't know what to do about it. Anybody have any ideas on what my problem is?

Every particle system in my game has this issue.