Probably my favorite part of design is the language we invent around certain design elements. It took me a good thirty minutes to figure out what that word for "the wavy underline" was in my neovim theme settings. You see it often in typical spellcheckers. It's an "undercurl".

Side note. I love my "Red Mars" theme color theme I've built up over the years. I built a green and blue one, but the burnt reds are my favorite.