Based on your requirements for a transitional color palette that incorporates #E60000 as an accent color while preparing for your upcoming branding shift, I’ve created a palette that includes complementary colors with similar values to the new branding colors. This palette avoids greens and teals and steers clear of greys, browns, and peaches.

 <Transitional Color Palette>
1. Dark Red - 
                            
                            #A40000
                         - A deep, rich red that provides a darker counterpart to 
                            
                            #E60000
                        , adding depth without straying into unwanted hues.
2. Coral - 
                            
                            #FF5C5C
                         - A mid-range, vibrant coral that harmonizes well with 
                            
                            #E60000
                        , suitable for various assets while maintaining a lively feel.
3. Soft Cream - 
                            
                            #F7F3E8
                         - A warm, soft cream that offers a light neutral grounding, contrasting nicely with the stronger colors without being stark white.
4. Dark Charcoal - 
                            
                            #333333
                         - A dark charcoal that serves as a strong alternative to pure black, adding sophistication and depth while remaining versatile.
5. Blush Pink - 
                            
                            #F1A7B8
                         - A gentle blush pink that complements the red tones while being distinct from the greens and teals of your future palette.

Color Palette Description:

This transitional color palette is designed to balance the boldness of #E60000 and provide a smooth visual transition to your new branding. The darker red adds depth, while the coral provides vibrancy. Soft cream acts as a neutral base, dark charcoal offers sophistication, and blush pink introduces a softer touch.

Follow-Up Questions:

1. Are there any specific contexts or applications where you plan to use these colors (e.g., website, print materials)?
2. Would you like to explore any specific shades or variations of the suggested colors?
3. Do you have any other color preferences or restrictions that should be considered in this palette?