I have a great navy with subtle pinstripe pantsuit that I can pair with a jewel tone blouse, gray or dark brown heels and a nice necklace.A friend of mine and our companies former COO had to meets with a bunch of senators over the summer. Powersuit was definitely the choice. Maybe not a Gloria Allred blazing color number, but it's washington, they are judgy fuckers, and suits are more the standard than dresses. Just take a look at any congressional or senatorial meeting captured online for examples.
But yeah, hiding the tattoo is a good choice.