Midnight Blue

Dark GUI - Inventories, menus, tables, all that.

Blue Highlights.

Blue UI - Xpbar, Xpbar level, health, hunger, armour, vehicle health...

Blue XP orbs

Blue Experience Bottle.

Black Panorama (Background)

Also has some Vanilla Tweaks textures: Twinkling Stars, Groovy Levers, Mine Progress Bar (It had Dark GUI as well, but I replaced with an even darker one)

Smaller crosshair (same plus shape crosshair, but only one pixel long each side).

It's basically a really relaxing pack with minimal bright colors with a very strong hint of blue. I really love blue.