Full marks for your efforts there Phil.
It's only by trial and error that you'll discover the optimum lighting conditions that give you the best possible colour rendition of your flowers.
If the colour on your PC monitor looks as close as possible to the actual flower/s, then you will know that you have your camera and monitor optimally calibrated. If anyone else on the Forum sees the colour/s differently to what you see (and you already know them to be correct) then it would indicate that their monitors are not fully calibrated. There are bound to be slight differences but I would guess that overall we will see a close rendition of the actual colour of your flowers.
If you're happy with the results then that is perfect.
Laurie.