“When it comes to interior and what we surround ourselves with, it’s so nice that we can choose to have this serene, calm atmosphere,” she said.

As for what’s next, Ms. Agaton takes a practical view.

“I think I change less and less the older I get,” she said. “Today we also have to consider the sustainability. We can’t really make a pink kitchen just because we feel like pink today because you know that it’s not going to last.”

Ms. Agaton reveals that she would like to design a hotel, and cites the boutique property Ett Hem in Stockholm, which was designed by Ilse Crawford, as an inspiration. But she demurs about having other design ambitions.

“I try to stay out of what’s not my thing, you know, like designing furniture,” she said. “There are so many people who are better than me who are doing that. I always try to stick to what I’m good at.”

And what she’s good at — from artful styling to palette predictions — are the details.

“If we make an interior and then there’s a cup of ugly pencils, then the whole thing is ruined,” she said, laughing.

In design, it’s always the details. And in this case, a ceramic cup of grayscale Copic markers.