< Bold Innovative >
1. Background - 
                            
                            #FFFFFF
                         - A clean, bright white that provides a fresh and open canvas for content.
2. Text - 
                            
                            #333333
                         - A dark, rich charcoal that ensures excellent readability against the white background.
3. Primary Action - 
                            
                            #FF5733
                         - A vibrant coral that draws attention and encourages user interaction.
4. Secondary Action - 
                            
                            #4A90E2
                         - A strong blue that complements the primary action while maintaining a professional tone.
5. Accent - 
                            
                            #F1C40F
                         - A bold yellow that adds a pop of energy and can be used for highlights or notifications.

This color palette embodies a bold and innovative aesthetic, utilizing bright and eye-catching colors to engage users while ensuring readability and compliance with WCAG 2.1 standards.

Follow-Up Questions:

1. What type of application or website will this color palette be used for?
2. Are there any specific branding guidelines or existing colors that should be considered?
3. Would you like additional shades or tones for any of the colors?