We just built a beautiful new house in northern wisconsin on a lake. The walk-out level we had stamped and colored concrete poured in May of this year. We picked a light brown. The concrete company poured 2 differnt sections and the colors came out different in color. One side is noticeably darker and mottled in color than the other. They tried to use an acid injection but it didn't help. We have hydronic tubing under this concrete floor. They say they can't correct the color any further. We spent thousands of dollars on our dream house only to have the walk out level look like garbage. We didn't want to carpet the floor since a lot of sand gets brought in from the lake area and we wanted the floor to emit as much heat as possible. Any solutions please????