I'm with bjchad--some pops of color--like a goldenrod or a bright violet, would really make this into a very modern quilt. I'd do that without any sashing, mixing in a few pops of color into the blocks, then use 3 borders--about a 1-2" one of one of the teals (either the very light or the darkest), a VERY thin strip of the "pop" color and then a wider border of either the dark or the light (whichever you didn't use on the first one). I do think getting used to all solids quilts takes awhile!