Based on your requirements, I've created a minimalistic, functional color palette that complements your existing logo colors (
                            
                            #fdd835
                         and 
                            
                            #2d2d2d
                        ), tailored for an interior design website. This palette aims to blend simplicity with sophistication, ensuring a clean and modern aesthetic that promotes usability and a visually appealing interface.

1. **Sunny Highlight** - 
                            
                            #FDD835
                        
   - Description: A vibrant, sunny yellow that injects energy and creativity, perfect for highlights and call-to-action elements.

2. **Deep Space** - 
                            
                            #2D2D2D
                        
   - Description: A strong, dark gray that offers a grounding, sophisticated contrast to the palette, ideal for text and key graphical elements.

3. **Pristine White** - 
                            
                            #FFFFFF
                        
   - Description: Pure and minimal, this white offers a clean backdrop, ensuring content stands out and the design feels open and airy.

4. **Soft Silver** - 
                            
                            #BDBDBD
                        
   - Description: A light, neutral gray that bridges the gap between dark and light tones in the palette, excellent for secondary text and subtle backgrounds.

5. **Warm Taupe** - 
                            
                            #9E9E9E
                        
   - Description: A mid-tone gray that adds a warm, inviting quality, perfect for creating a sense of comfort and sophistication in navigation and footer backgrounds.

6. **Skyline Steel** - 
                            
                            #757575
                        
   - Description: A muted, steel gray that provides a versatile accent color, suitable for subtle detailing and to enhance usability in icons and borders.

This palette combines the energy of 
                            
                            #FDD835
                         with the solidity of 
                            
                            #2D2D2D
                        , enriched by complementary neutrals. It's designed to create a minimalistic yet inviting digital space that embodies modern interior design principles: form, function, and aesthetics.