Visual Studio 2015 brought several major productivity enhancements:
Change fonts, colors, and themes in Visual Studio - Microsoft Learn 13-Jan-2026 — microsoft visual studio 2015
If you fire up VS2015 today, you’ll notice the familiar blue theme, the slightly sluggish startup, and the comforting chime of a successful build. It’s a nostalgic piece of development history, but like all great tools, it has a time and a place. you’ll notice the familiar blue theme