Every purple flower in the library
49 of the 82 flowers here carry this colour, ordered by how much of it the photograph actually shows. The library keeps one picture per flower and most of these come in several colours.
Why purple is the colour it is
Purple sits in the middle of the same pigment family that makes both red and blue. Delphinidin and cyanidin are the raw material, and where the colour lands is decided by the acidity inside the cell and by co-pigments stacked alongside the anthocyanin. That balance is delicate enough to shift within a single flower's life: many purples open bluer and age pinker as the sap acidifies. It is also why purple is the easiest colour for a breeder to reach and the hardest for a label to describe.
Deep purple absorbs almost everything that falls on it, so in a shady corner it reads as an absence rather than a flower. Keep the darkest purples where the light hits them, or put silver, chartreuse or white directly behind.
How purple each one really is
The same flowers again, this time grouped by how much of the colour is actually there in ordinary daylight rather than on a label.
What purple sits well with
What purple says
Purple carries dignity, ceremony and a certain distance, from the days when the dye cost more than the cloth. In a bouquet it reads as admiration for someone you do not know intimately, which is why it turns up at graduations.
























































































































































































