Color Palette for a High-End Restaurant serving Traditional Portuguese Cuisine:

1. Color Name: Porto Blue
   Hex Code: 
          
          #004B8D
       
   Description: This deep, rich blue hue represents the coastal city of Porto in Portugal. It evokes a sense of sophistication and elegance, reflecting the high-end dining experience offered by the restaurant.

2. Color Name: Terra Cotta
   Hex Code: 
          
          #B56137
       
   Description: This warm, earthy tone reminiscent of terracotta pottery represents the traditional elements of Portuguese cuisine. It adds a rustic charm and a touch of authenticity to the restaurant's ambiance.

3. Color Name: Olive Grove
   Hex Code: 
          
          #6B8E23
       
   Description: Inspired by the lush olive groves scattered across Portugal, this muted green shade represents the fresh ingredients and Mediterranean influences in traditional Portuguese dishes. It adds a natural and calming element to the palette.

4. Color Name: Golden Amber
   Hex Code: 
          
          #FFBF00
       
   Description: This vibrant, golden hue represents the warmth and richness of Portuguese culture. It symbolizes the sunny landscapes, the welcoming atmosphere, and the passion for food. It adds a touch of luxury and energy to the palette.

5. Color Name: Creamy Linen
   Hex Code: 
          
          #FDF6E3
       
   Description: This soft, creamy off-white shade represents the refined and elegant ambiance of a high-end restaurant. It provides a neutral base for the palette, allowing the other colors to shine while creating a sophisticated and inviting atmosphere.

This color palette combines deep blues, warm earth tones, fresh greens, vibrant gold, and a soft cream to create an ambiance that reflects the traditional Portuguese cuisine served at the high-end restaurant.