Here is a quick list of tips to improve logo exposure with branding assets.
1. Contrast is critical - the sharper it is between the font and the sign background, the better
2. Color Uniqueness from other sponsors and the relevant field of play - stand out.
3. Clear, easily readable font
4. The larger the letters, the better
5. Keep it concise
6. Avoid negative spacing
7. Bright colors are impacted most by sunlight glare
8. Combinations of the brand logo and name improve recall
9. Persistency and consistency of the brand name & logo