Add an alternative theme, or at least alternative scenario color lists, and a menu item or button to switch themes.
The alternative theme should use blue and yellow color to cover the most prevalent forms of colorblindness:
Current theme
Current theme with Deuteranomaly or Deuteranopia
Deuteranomaly (~5% Men, ~0.35% Women)
Deuteranopia (~1.1% Men, ~0.01% Women)
Current theme with Protanomaly or Protanopia
Protanomaly (~1.3% Men, ~0.02% Women)
Protanopia (~1.2% Men, ~0.02% Women)
Tritanomaly & Tritanopia (Blue Weak-/Blindness) is extremly rare (~0.01 Men/Women, and 0.001% Men 0.03% Women) and Theme colors are mostly discernable in these cases.
Add an alternative theme, or at least alternative scenario color lists, and a menu item or button to switch themes. The alternative theme should use blue and yellow color to cover the most prevalent forms of colorblindness:
Current theme
Current theme with Deuteranomaly or Deuteranopia
 Deuteranomaly (~5% Men, ~0.35% Women)  Deuteranopia (~1.1% Men, ~0.01% Women)Current theme with Protanomaly or Protanopia
 Protanomaly (~1.3% Men, ~0.02% Women)  Protanopia (~1.2% Men, ~0.02% Women)Tritanomaly & Tritanopia (Blue Weak-/Blindness) is extremly rare (~0.01 Men/Women, and 0.001% Men 0.03% Women) and Theme colors are mostly discernable in these cases.
All color blindness simulations were generated and can be tested with this tool: https://www.color-blindness.com/coblis-color-blindness-simulator/