Monocolored
Monoclored means one color in respects to a card's color.
From the Comprehensive Rules (June 7, 2024—Modern Horizons 3)
- 105.2a A monocolored object is exactly one of the five colors.
From the Comprehensive Rules (June 7, 2024—Modern Horizons 3)
- 105.2c A colorless object has no color.