I like this colour of blue. It is lapis lazuli and is seen in church painting and stain glass windows.
Kelvingrove Art Gallery examples.
Lapis Lazuli [Wikipedia]
In the RGB color wheel it is "azure" (Hex #007FFF)
From out disply coffee table collection we have ... not Lapis Lazuli ... but some Labradorite. We obtained it nearly 50 years ago when on an mountaineering expedition in Labrador with Jim Messer.
Labradorite label side from our coffee table.