I am planning to expand my niche website by using sub domains.
For ex: i have website on "Blue Widgets" (www.bluewidgets.com)and i would now like to expand it (because it is already strong and has good number of links and content) by adding subdomains, like red.bluewidgets.com, yellow.bluewidgets.com
What is bothering me is that the domain name is specifically related to blue widgets and if i add subdomains with other types of widgets, it could hurt my site in terms of SEO or G would consider it irrelevant.
I am thinking and i am not sure what should be done, either do subdomains or start a new website from scratch with a new domain name etc.
I need your advice on this.