hijack from Longer 'lasting' color...

[Sensei]

You seriously ask such a question about color, at a time when you should be investing in solar panels on your roof.. ?

Buy rooftop solar panels in one..

ps. Make it pink..

24 minutes ago, Externet said:

-Image borrowed from web-

Things made from Copper acquire H₂O and CO₂ from the air, and change to Cu₂CO₃(OH)₂.

https://en.wikipedia.org/wiki/Basic_copper_carbonate

https://en.wikipedia.org/wiki/Patina

Which is on the roof of most medieval buildings.. When their builders used a copper roof..