Can niagara particles store value?

I’m making some effect with niagara system.

I’d like to know whether each niagara particle can store some value like bool or not.

When character is near to particles, I want particle’s color to change to another color.

so I made it to particle’s color change.

but when character is getting further, particle color change back to original color.

I thought if particle can store bool value, particle’s color can keep new color.

how can i make it?

sorry for bad english;;;

thank you

Maybe this thread can help you change particle colors.