2. Words expressing color in poetry entrust the poet's feelings.
3. No, because the former is obvious and intuitive, and the latter needs a little pondering, which is in line with people's cognitive habits.
4. There is no need to directly describe the words expressing colors, and all kinds of scenery are skillfully combined to form the beauty of color tones.
5. Pursuing the gradual beauty of single tone; Use a combination of multiple colors; Form a sharp color contrast