Gardener and Photographer with a love of Roses and a magpie-eye for all things Horticultural
May I refer you to Wikipedia –
https://en.wikipedia.org/wiki/Purple
Sometimes more blue, or lilac, lavender, rose, red, but a not pure blue, or pink depending on which is closest, a varied palette – cool, rich, and elegant tones. Thug, the Petersham Cat, rounding up proceedings.
I rest my case …
The Teddington Gardener 
My least favorite of the floral colors, but a big seller for the rhododendrons. Only pink is more popular, but probably only because there are more pink cultivars.