Sure! Here’s a color palette that you can use for creating an architectural diagram for a Spring Batch application. The palette is designed to provide a professional and modern look, suitable for technical diagrams. 

### Spring Batch Architectural Palette

1. **Spring Green**
   - **Hex Code:** 
                            
                            #00FF7F
                        
   - **Description:** A vibrant green color that represents the Spring framework. It can be used to highlight key components and processes in the application.

2. **Steel Blue**
   - **Hex Code:** 
                            
                            #4682B4
                        
   - **Description:** A calm and steady blue, perfect for illustrating data flow and transitions. It maintains a professional look while providing good contrast.

3. **Slate Gray**
   - **Hex Code:** 
                            
                            #708090
                        
   - **Description:** A neutral gray that can be used for background elements, borders, and less critical components. It helps in maintaining a clean and organized layout.

4. **Goldenrod**
   - **Hex Code:** 
                            
                            #DAA520
                        
   - **Description:** A warm golden color to highlight important annotations or critical paths within the diagram. It adds a touch of emphasis without being too overwhelming.

5. **Dark Olive Green**
   - **Hex Code:** 
                            
                            #556B2F
                        
   - **Description:** A deep, earthy green that pairs well with Spring Green. It can be used for secondary elements or background processes, providing a sense of depth.

6. **Light Coral**
   - **Hex Code:** 
                            
                            #F08080
                        
   - **Description:** A soft coral color to highlight warnings, errors, or exceptions within the batch processes. It stands out without clashing with the overall palette.

### Palette Summary:
This palette combines a mix of vibrant and neutral tones to visually differentiate various components and processes within a Spring Batch application diagram. The colors ensure clarity and maintain a professional aesthetic, making your diagram both informative and visually appealing.