Grayscale Theme

This a simple grayscale theme, that's easy on the eyes and looks quite stylish. It's perfect for those wanting a theme not too vibrant and outstanding, but want something that looks professional and simple. Please leave any feedback below, and I'll see what I can do about improving the theme. ~ Zan

<!~~ Update 1.0.2.3 ~~> Changed the text color of active and inactive tabs. Active tabs had black text, and could be hard to read, so I've changed it to white. Inactive tabs had white text, but this was now the same as the active tab, so I've changed it to a dark grey. It also makes the active tab seem more important than the others, given the text colour, which I think is needed.