Here's a beautiful color palette perfect for a cool tones winter wedding featuring blue, green, yellow, and purple:

### Cool Tones Winter Wedding Palette

1. **Frosty Blue**
   - **Hex Code:** 
          
          #A8D8E9
       
   - **Description:** A soft, icy blue that evokes the serene beauty of winter skies, providing a tranquil base for the palette.

2. **Teal Mist**
   - **Hex Code:** 
          
          #4FB8B0
       
   - **Description:** A calming teal that adds depth and elegance, reminiscent of frosty waters and pine-filled forests.

3. **Lemon Chiffon**
   - **Hex Code:** 
          
          #F6EBA8
       
   - **Description:** A delicate, pale yellow that brings warmth and brightness, adding a cheerful touch to the cool tones.

4. **Lavender Haze**
   - **Hex Code:** 
          
          #D6C4E0
       
   - **Description:** A soft lavender that introduces a hint of romantic charm, perfect for a dreamy winter setting.

5. **Emerald Ice**
   - **Hex Code:** 
          
          #007B5F
       
   - **Description:** A rich emerald green that grounds the palette, reminiscent of evergreen trees and festive decorations.

6. **Royal Purple**
   - **Hex Code:** 
          
          #5D4C8E
       
   - **Description:** A deep, regal purple that adds a touch of luxury and sophistication, creating a striking contrast against the lighter tones.

### Palette Overview:
This palette combines soft, cool tones with a splash of warmth, perfect for a winter wedding. The colors work harmoniously together, creating an elegant and inviting atmosphere that reflects the beauty of the season. Use these colors for floral arrangements, bridesmaid dresses, table settings, and overall decor to achieve a cohesive and enchanting winter wedding theme.