Slight black drop shadow under white text in a grey shortcut bar (if you have that showing) and extends into same grey tab. That high-contrast with the dark grey or black inactive tabs makes it very easy to see what tab you're on if your monitor is low-contrast or light comes in at an angle to your screen. There's a circular zigzag flourish graphic in the top right. Not exactly minimalist, but I like it. Excellent work. Thanks so much!