Hepatica americana colors

The colder than usual spring this year (2019) has had one advantage: both Hepatica acutiloba and Hepatica americana have remained much longer in flower which allowed me to have a better look at various populations from which I collect seeds.
I followed few previously known specimens from buds to full flowering and then to fading; this allowed me to understand more about their colors in particular.

I mentioned before that most populations of Hepatica americana where I collect seeds are not blue, there is a fair amount of purple; in ‘real’ they are in the blue-violet range (from pastel to pure). I also never liked to use the ‘pink’ name because none are really pink. Light/pastel blue flowered plants are present only in mixed populations.

Last year I postpone it but I finally made the chart seen above (using the RGB palette) which will be used from now on when talking about Hepatica americana/ and H. acutiloba flowers colors.

One phenomenon of this spring was that some plants I knew perfectly as being white, flowered with tinges of pink.
It seems that the amount of antocyanins in flowers varies with the temperature, increasing with the cold weather; this is known to happen to other species as well.

Also, in some cases there can be quite a dramatic change from bud to full flowering color – see the transition in H. americana offered as deep pink in 2018; ‘deep pink’ for sure didn’t described it well.
The buds when they open are actually deep violet and then the color fades as the flowers open. First I thought I was looking at a wrong plant, if not for my label! During flowering the color changes gradually.

Enjoy the flowers pictures, and a new finding with larger than usual flowers. What color is it? Use the chart.