1. Highlight Key Elements: Use flashy colors sparingly to highlight important elements such as call-to-action buttons, headlines, or special offers. This will draw attention to the most critical parts of your email. 2. Contrast for Readability: Ensure that there is sufficient contrast between the flashy colors and the background to maintain readability. For instance, a bright red text on a white background can be striking and readable. 3. Brand Consistency: Make sure that the flashy colors you use are consistent with your brand identity. This helps in maintaining a cohesive look and feel across all your marketing materials. 4. Test and Optimize: Conduct A/B testing to see how different colors perform in terms of open rates, click-through rates, and conversions. This will help you understand what works best for your audience.