Interesting colors will simply happen as you have a 2 blue gene (purebred) rooster that you are placing over varying white, tinted, and brown layers.
Typically the brown laying genes halve (there are about 13 in the brown shell process) meaning if you breed a white layer to a dark brown layer you get a mid tone layer....but all shades between (I'll post my egg chart and color box below).
Full purebred dark brown genes bred to a pure blue gene will produce olive. Mid-tone terra cotta will get more spring tone green. I've also gotten an golden olive. You'll get shades of tones as those brown genes filter in and out, especially with breed backs in 2nd and 3rd generation. You will continually see your olive lighten to green as your rooster only has blue to contribute and you will be consistently losing brown genes.
With my brown gene Barnelder (pure) rooster, I see the progeny with my pure Cream Legbar hens producing spring tone olive. Barney bred over F1 Marans-Isbar produces about 1/3 dark olive, 1/3 mid olive, 1/3 gold olive. I am working on second and third olive generation now with those daughters bred back to a son (olive egger Cream Legbar-Barnvelder). Should have results in about a month for their egg color. I will then breed back that generation to grandpa Barnevelder to freshen the brown genes again to produce deeper olive.
When you get to the point that your brown has begun to wash out genetically, you can add a Black Copper Marans or a Barnevelder rooster to cover the green laying girls to begin to freshen olive.
Every generation will see a range of colors naturally with what you have simply as the brown genes over blue shell produces ranges. Note with the 2 blue gene rooster, ALL your babies will produce hens that are blue-green layers. You won't get back to white. You would have to breed a white laying bird to a white laying bird. You also won't get back to pure blue (Ameraucana style eggs) without some effort, always taking your truest blue and breeding those daughters back to poppa because you are effectively stripping away the brown genes each generation. And you won't get back to pure brown as you've got blue genes in each daughter breeding back to blue gene poppa. Eventually you'll end up with double blue gene daughters with eventually a homogeny of blue-green color in varying shades unless you reintroduce browns or purchase purebreds to add additional color.
Fun project
What you've got will produce lovely ranges. Have fun
LofMc
... but I should definitely have more colors 
... one of them is the Cuckoo Marans and three of them are EEs
