Color Palette for a Merchandise Brand Targeting People Recovering from Drugs and Alcohol:

1. Serenity Blue - 
                            
                            #9DC3D4
                         - This light blue color represents serenity and calmness, which is essential in the recovery process.

2. Sober Grey - 
                            
                            #8B8B8B
                         - This neutral grey represents sobriety and stability, which are essential for a successful recovery.

3. Hopeful Green - 
                            
                            #8CC63E
                         - This bright green color represents hope and growth, which are crucial in the recovery journey.

4. Courageous Red - 
                            
                            #FF5733
                         - This bold red color represents courage and strength, which are necessary to overcome addiction.

5. Refreshing Yellow - 
                            
                            #FDE74C
                         - This vibrant yellow color represents freshness and energy, which are essential for a new beginning in life.

This color palette is designed to create a sense of calmness, stability, hope, courage, and energy. These colors can be used in various merchandise items, including t-shirts, hats, mugs, and bracelets, to encourage and motivate people in their recovery journey.