Here is a single color palette with color names, hex codes, and a palette description using the keywords "爽やかな青" (refreshing blue):

1. Color Name: Sky Blue
   Hex Code: 
                            
                            #87CEEB
                        
   Description: A light and serene blue reminiscent of clear skies on a beautiful summer day.

2. Color Name: Seafoam Blue
   Hex Code: 
                            
                            #00FFFF
                        
   Description: A vibrant and cool blue-green shade that evokes the refreshing colors of the ocean.

3. Color Name: Powder Blue
   Hex Code: 
                            
                            #B0E0E6
                        
   Description: A soft and delicate blue hue similar to the color of pale blue flowers or powdered pigments.

4. Color Name: Cerulean
   Hex Code: 
                            
                            #007BA7
                        
   Description: A deep and vivid blue shade resembling the color of a clear sky during midday.

5. Color Name: Ice Blue
   Hex Code: 
                            
                            #F0FFFF
                        
   Description: A pale and icy blue color reminiscent of frozen glaciers or the coolness of winter.

6. Color Name: Turquoise
   Hex Code: 
                            
                            #40E0D0
                        
   Description: A bright and refreshing blue-green shade resembling the color of tropical waters or precious gemstones.

This palette captures the essence of "爽やかな青" by featuring a range of blue shades that evoke feelings of calmness, freshness, and tranquility.