↑ Red
Highest card wins (auto-played)
= Orange
Same value as the canvas card
‖ Yellow
Color shared with at least one other available card
/: Green
Even values only (2, 4, 6)
| Blue
Unique color (no other available card shares it)
± Indigo
Value within ±1 of the canvas card
↓ Purple
Low values only (1, 2, 3)