I would have chosen a slightly warmer blue and green as well, and maybe a Payne's gray rather than the yellow ocher. Of course I could have bought the colors individually to get exactly what I wanted, but that would have cost about $40 rather than $14. :-)
And this is just an experiment. I tried them today and created the above, 8x10 on canvas. Definitely just a quickie and tomorrow I may make changes, but an interesting experiment.