Sure! Here’s an updated winter color palette with a replacement for the white color.

 <Winter Vibes>
1. Frosty Blue - 
                            
                            #A8D8E6
                         - A soft, icy blue reminiscent of winter skies.
2. Silver Mist - 
                            
                            #C0C4C7
                         - A cool, silvery gray that evokes frosty mornings and a modern winter feel.
3. Pine Green - 
                            
                            #2E4A2F
                         - A deep, muted green reflecting evergreen trees in winter.
4. Berry Red - 
                            
                            #B03A2E
                         - A warm, rich red that adds a pop of color, reminiscent of winter berries.

This revised palette maintains the serene and cool atmosphere of winter while replacing the white with a silvery gray, adding a modern touch and depth to the design.

Would you like to adjust any specific colors further, or do you have any other elements in mind for the dropdown box design?