Here’s a color palette for your app’s red scheme, incorporating the existing colors and adding the lightest and two darkest reds:

 <Red Scheme>
1. Light Red - 
                            
                            #FFCEDA
                         - A soft and gentle light red, perfect for backgrounds or highlights.
2. Light Pink Red - 
                            
                            #FFA7BF
                         - A warm, vibrant pinkish-red that adds brightness and cheer.
3. Dark Pink Red - 
                            
                            #DA2F5E
                         - A bold and striking medium red, suitable for buttons or accents.
4. Deep Crimson - 
                            
                            #BE164F
                         - A rich, deep crimson that evokes a sense of luxury and depth.
5. Dark Red - 
                            
                            #960F3D
                         - A strong and intense dark red, great for headers or important elements.
6. Darkest Red - 
                            
                            #7A0C31
                         - A deep shade of red, almost burgundy, that provides a strong contrast for dark mode.
7. Darker Red - 
                            
                            #5C0A25
                         - An exceptionally dark red that delivers a dramatic effect, perfect for shadows or deep backgrounds.

This palette provides a smooth gradient from light to dark shades of red, suitable for both light and dark modes. The light reds are inviting, while the darker shades convey strength and boldness.

Do you have specific areas in your app where you envision using these colors, or are there any other themes you’d like to explore?