SO are marans eggs "usually" speckled or will those spots go away and the color will smooth out? also this being her first egg...will her eggs darken a bit or should i expect this color later on as well?
Speckles or not, and how many, is an individual hen thing... It changes a bit over the season, but not lots. Mostly, as the egg lightens over the season, if your hen makes spots, the spots become more visible.
I can't remember now if I have ever gotten a very light egg in the beginning, and the pullet then laid darker eggs. In general they start very dark and hopefully, with good breeding, lighten up gradually and slowly over the season.