- Absurd
- Far-fetched
- Impractical
- nonviable
- Pie-in-the-sky
- Pie-in-the-sky airline cuts need refining
- Unworkable
- Skies
- Sky
- Wide blue yonder
- A bright blue colour
- A deep blue colour
- Blue hue
- Blue shade
- Cloudless (sky)
- Lapis lazuli colour
- Radical sailor in blue
- Deep blue
- Sky blue
- Sky-colored; blue; azure.