This update from Esri regarding the new Canvas Map Option… The new Light Gray Canvas Map provides a neutral, light gray background with minimal labels and features, drawing attention to your thematic content, thus making it an ideal basemap for bringing your data to the foreground. The Light Gray Canvas Map supports strong colors, creating a visually compelling map graphic that makes it easy to see the intended patterns. Currently, Canvas Map Light Gray covers the world to the caching scale of approximately 1:2,000,000. Coverage extends in North America to approximately 1:9,000.
Image Source: Esri
For more about Canvas Maps see – Esri Canvas Maps Part I: Author Beautiful Web Maps With Our New Artisan Basemap Sandwich