According to the Cambridge English Dictionary, the order of adjectives in English is to be:
- opinion (e.g., unusual, lovely, beautiful)
- size (e.g., big, small, tall)
- physical quality (e.g., thin, rough, untidy)
- shape (e.g., round, square, rectangular)
- age (e.g., young, old, youthful)
- colour (e.g., blue, red, pink)
- origin (e.g., Dutch, Japanese, Turkish)
- material (e.g., metal, wood, plastic)
- type (e.g., general-purpose, four-sided, U-shaped)
- purpose (e.g., cleaning, hammering, cooking)
Based on that, the proper order of adjectives in your example and proper way to write it would be: "nice, blue, Korean, cotton blouse" (i.e., nice(1), blue(6), Korean(7), cotton(8) blouse). That means that 2 is indeed the correct order.
Note: What you've labled as 2 is not a sentence, as you stated, nor is it properly written as coordinate adjectives require commas separating them, as seen in my answer above in bold.