I'm doing some research on the colour palette used by Giotto as anyone had experience with these (information from ColourLex)
Giotto, Pentecost | ColourLex https://colourlex.com/project/giotto-pentecost/
Red ochre (slighlty orange)
Not too sure what oil colours (or pigments if to be mixed with egg tempera) can come close to Dragon's blood?
and what about Azurite and Ultramarine are they close?
Thanks for your help!