Update README.md

[sweenu]

colours → colors

Maybe it used to work in an old version of tridactyl but it does not in the latest version.

[yarub123]

Unrelated but I didn't create a new request or issue....First off thank you for the time and effort that you put in behind all the base16 themes. Truly awesome.
Question, wondering how to maintain theme but rather than shydactyl as the foundation, rather have it as default and it displaying on the bottom rather than in middle of screen. If possible please direct me on how to do it, I have searched all over. Most of my search has led me to older 2017/2018 responses to tridactyl themes which require the config/themes setup. Which AFAIK is not available in the newer tridactyl? I hope that's correct. Basically I have found no way for me to find the actual theme config on my computer in firefox folder (MacOS).

(PS: i do have the native messenger if that is the way to do it)

Thanks again.