What basic shader is needed for change the color on particle system with particles based on a spritesheet?

Hi I have a particle system loaded with a material what have loaded a spritesheet. As far as i know that is the only way for having a spritesheet working on a particle system. My problem is that if i try to activate color parameters,nothing happens with Unlit/Transparent shader. Changing shader for Legacy/Particles/Additive make it's works, but particles are semi-transparent and i want them on full opacity. Do you know what shader i need? I think this is something very simple and doesn't requiere complex custom shaders...