Regardless of the spelling, Darcy sounds more feminine than masculine. Lots of names have switched genders over time. Lynne and Lindsey are two I thought of right off.
Of course, Mr. Darcy doesn’t count as a male name as it’s his surname. Grigsby reminds me of an Elton John song, or is it Grimsby?
Enjoy Darcy! It’s your name after all.