Based on your request for a color palette suitable for categorizing employees in Google Spreadsheets, here’s a vibrant and functional palette that builds off the standard light green, yellow, and red. This palette includes additional colors to help differentiate job levels while maintaining a cohesive look.

### Color Palette for Employee Categorization

1. **Active**
   - **Color Name:** Light Green
   - **Hex Code:** 
          
          #C6EAB6
       
   - **Description:** A soft, refreshing green that signifies active employees, symbolizing growth and vitality.

2. **Training**
   - **Color Name:** Light Yellow
   - **Hex Code:** 
          
          #F7E7A0
       
   - **Description:** A warm, inviting yellow that indicates employees currently in training, representing optimism and potential.

3. **Inactive**
   - **Color Name:** Light Red
   - **Hex Code:** 
          
          #F4B6B6
       
   - **Description:** A gentle light red that denotes employees who are not active, conveying caution and the need for attention.

4. **Senior Level**
   - **Color Name:** Deep Green
   - **Hex Code:** 
          
          #A3D9A1
       
   - **Description:** A more robust green that signifies senior-level employees, showcasing stability and experience.

5. **Mid-Level**
   - **Color Name:** Amber
   - **Hex Code:** 
          
          #F2B84C
       
   - **Description:** A vibrant amber that represents mid-level employees, indicating energy and a balance of experience and potential.

6. **Entry-Level**
   - **Color Name:** Soft Coral
   - **Hex Code:** 
          
          #FFB3BA
       
   - **Description:** A soft coral that denotes entry-level employees, reflecting enthusiasm and a fresh start in their careers.

### Palette Summary
This palette combines light and engaging colors that are easy on the eyes, while clearly differentiating between various employee statuses and job levels. The colors are harmonious and can be easily used in Google Spreadsheets for visual categorization, helping to quickly identify each group's status at a glance.