Green Mucoid plaque

I have passed nucoid plaque of the vert same color as the stones I pass when I do a liver fluch: olive green. Is it common?

My understanding was it should be dark brown or black.

My last Liver Flush was 2 or 3 weeks ago. In your opinion, would the flush have affected the plaque's color back then or was there a bile flush involved today when I passed it?