About color/style option:
If you see numbers(such as 1, 2, 3...) in the product pictures, and if you see color option(Color 1, Color 2, Color 3...) in the option which above add to cart button. Yes, you are right, Color 1 for the picture which has number 1, Color 2 for the picture which has number 2... eg, if you want to order the item which picture has number 1, please choose Color 1 and add it to cart.
Klay Thompson Golden State Warriors 11 School Bag Backpack
Sources: Klay Thompson Golden State Warriors 11
Material: Nylon, Canvas
Size: 45cm x 32cm x 15cm, 17.7" x 12.6" x 5.9"
Feature: Compatible with 14" - 15.6" laptop
The color 2 backpack is Luminous backpack which pattern is white in daytime and blue luminous at night.