Can I open a company with a similar name and in the same industry as one that is already established?

I want to open a company named Prismatic Consulting Group. I own the domain name www.prismatic.consulting. After a search on Google, I have found out that a company already exists with the name Prismatic Consulting and website, www.prismaticconsulting.com . They indicate they have a copyright however I searched through the copyright record and I did not find anything about them. I looked for trademarks they might have filed, again nothing. They are out of Pittsburgh and I am out of Chicago. If I were to proceed with opening a consulting firm under the name Prismatic Consulting Group, again their legal name is Prismatic Consulting, will there be any legal issues?