but not without a few sightly snags to get there...
Go to themebeta.com and create a custom theme for chrome, (even works for WinVista chrome version) and once you are done, pack the file and download it to your computer somewhere...
one that's done, create a folder (of any name) and a folder inside of it with special consideration to make the name with a special formula, like this [2.1.0_1] so use any number you like but it has to be the same each time and each folder you make of extensions doesn't necessarily have to always be a certain character set, like you may see in every other extensions folder it could be whatever you think of...
Think of the fact that each folder in C:->users->?->appdata->local........->chrome->default->Extensions that are default/fresh are all like miscued and look like someone just typed in a bunch of random letters... I kid you not that you "don't" have to keep the name of the folder format the same way!
you could name the folder "moms petunia garden" and the subfolder contents inside would contain the theme files (usually a folder with images and a *.json file inside "moms petunia garden" as listed before), is a folder you must create that has some numbers instead of letters... I don't know (at this time if you don't use their regimented numbers system it may go to not work in chrome) {ill let you know}
to clarify it for you:
In the Extensions Folder part of the app data area of the c drive, you would have the "
moms petunia garden" folder, which if you wanted to could contain more than one theme that you create, so if there was no problem using just words for these folders then you could call each theme "summer and "winter" and whatever you call the theme that you made at the website above...but if the lettering doesn't work... then try naming it "0.0.0_0" and each and every theme you make in the "moms petunia garden" folder would be named that way and then you can get on to the interesting part
*I'm using "moms petunia garden" as disambiguation to allow those to insert the name if whatever idea the themes they are making are about i.e "summer" "spring" "food" "trucks" travel" etc...go have fun with creating these folders and ill let you know.
when you have several folders made or if you have made one and haven't been able to know what to do with zip/chrome file please listen up!!
If you got the file in downloads open it up and notice its just an image folder and a*.json file....move both the image file and the image folder as one inside the themes folders you created earlier for the ",oms pteumnia garden" theme you are using...keep in mind you want to check images to see if you have copied it to the wrong one!!
from there go into chrome browser and open the extensions page "chrome://extensions/" and click on the developer mode and "load unpacked extension" and search for the folder and it should add the chrome theme!!
Done!!!
heres one i made from todays mikey mybryan video mar12/2020
https://drive.google.com/open?id=1N3tacjUgai3ZbbQtjbKcJIopw1r1C_sp