I'm trying to use git-graph. I have installed it, but I cannot obtain the output I see in the screenshots. In particular when I run it with its own repository from the Gnome terminal in Ubuntu, the colours are missing:
I did not configure anything, but used it "as is". I would expect to have a more colourful output, as shown in the screenshots in the github page.
Is this a problem with the colours in the terminal?

--coloror--color=always?--color=alwaysleads to the same result. Using--color=noneproduces an actual b&w result. I mean, I have some colours, just not the ones shown in the screenshots in the documentation. They are purple, orange and mostly grey.