4.

1) Dream Blue: Pure and bright “Dream Blue” is the color of the sky, representing goals, ideals and pursuits

2) Youth Green: Fresh and bright “Youth Green” is The color of life represents vitality and creation

3) Joy Orange: The passionate "Joy Orange" is the color of the earth, representing achievements and heritage

4) Commitment Brown: Kindness and perseverance "Promise Brown" is the color of nourished land, representing trustworthy quality and reputation