I gave up on coneflowers clashing, my tomato soups and coral reefs look the same this year I know I don't have that many of one of them out there now they are huge clumps and looking the same in bloom and have husker's red, jacob cline, cinderella milkweeds together they all clash
I have large patches of pinks and reds too just think this garden is too small to try and get the colors right
The butterflies like it so I don't care
I do have a lot of yellow but only three white plants trying to even it out but don't think it's working
I planted one of those datura inoxia there a couple of years ago in between the coneflowers but that thing won't bloom till after the coneflower blooms are gone probably it's only up a foot right now.