### September Planner Sticker Set Color Palette

1. **Burnt Orange**
   - **Hex Code:** 
                            
                            #D86A3D
                        
   - **Description:** A warm and inviting shade reminiscent of autumn leaves, perfect for adding a cozy feel to your planner.

2. **Mustard Yellow**
   - **Hex Code:** 
                            
                            #E1B12C
                        
   - **Description:** A vibrant and cheerful hue that brings a sense of brightness and energy, ideal for highlighting important dates and events.

3. **Olive Green**
   - **Hex Code:** 
                            
                            #4A7C2D
                        
   - **Description:** A muted yet rich green that captures the essence of changing foliage, offering a grounding element to your designs.

4. **Dusty Blue**
   - **Hex Code:** 
                            
                            #A4C8E1
                        
   - **Description:** A soft and calming blue that evokes the clear skies of early fall, providing a serene backdrop to your planner.

5. **Plum Purple**
   - **Hex Code:** 
                            
                            #6F2C91
                        
   - **Description:** A deep and sophisticated purple that adds a touch of elegance and mystery, perfect for a cozy autumn vibe.

6. **Warm Taupe**
   - **Hex Code:** 
                            
                            #BFA6A1
                        
   - **Description:** A neutral and earthy tone that harmonizes beautifully with the other colors, making it versatile for various sticker designs.

### Palette Overview
This September-inspired color palette combines warm, earthy tones with a few cool shades, creating a balanced and harmonious look for your planner sticker set. Each color reflects the essence of the fall season, making your planner feel inviting and organized for the upcoming month.