What would you like done?
A theme component placed in the header to toggle between light and dark theme
It can use the GitHub - discourse/discourse-color-scheme-toggle: Color Scheme Toggler to switch between Dark / Light schemes set by the user's preferences component.
When do you need it done?
Next 7 days.
What is your budget, in $ USD that you can offer for this task?
100$
Have you seen this?:
Alien Night Theme - A free Dark Theme for Discourse - theme - Discourse Meta
There is also the Theme component
It uses the alien theme dark mode, is not switching to the default dark theme.
Have you raised an issue with the author?
He hasn’t been active for a while but PM him meanwhile.
I see you’ve been active in his Topic already a while ago 
If the original author is not able to support what you need then please don’t let me stop you hiring someone … as you were! 
Sure @merefield, thanks for the pointers.
Hi @Mr.X_Mr.X
Can you try this theme component?
I’m using this one, is just that I need the button to be in the header and not in the hamburger menu. Users who are not well versed in setting up their interfaces seem to not be aware of the hamburger menu at all.
This is a pretty good request. When I have some time, I could look into adding a setting for that component to either display it in the hamburger menu, or in the header.
Would you mind closing this current topic, and making this suggestion as an addition on the topic for the theme component?
FYI I’m not sure that exists, hence all the links to GitHub 
Below is the component but as @merefield mentioned it doesn’t have a topic in meta.
Whoa! I can’t believe I never made a topic for this…
starts making topic
Here ya go!