I love the color blue!  I have painted all of the rooms in my house that color, with matching blue furniture!
Are they all the same variations of blue? I would hope they would be different hue's and such.
Yes, some are indigo blue, some sky blue, and some are robin's egg blue.
The word Indigo for indigo blue comes from the blue milk mushroom with is a species of fungus
That's interesting!  And co-incidentally, I do love fresh mushrooms!  Who knew that they had a connection to my favorite color!
Mushroom
A mushroom, or toadstool, is the fleshy, spore-bearing fruiting body of a fungus, typically produced above ground on soil or on its food source.
The standard for the name "mushroom" is the cultivated white button mushroom, "Agaricus bisporus"; hence the word "mushroom" is most often applied to those fungi (Basidiomycota, Agaricomycetes) that have a stem (stipe), a cap (pileus), and gills (lamellae, sing. lamella) on the underside of the
the Prophets are painted.
All frescoes were made in the same style. Most likely, they were made by a group of painters, two of whom were the principal ones. Sky blue, red, and yellow colours dominate. There are also some colour variations, including the usage of white colour, which are not typical for Eastern Orthodox frescoes of the time and only have some parallels with the Byzantine painting, which gives a hint that the painters were Greek.