All 4 Uses

blues
in
Chandra's Wars
(Auto-generated)

The air is a dark, dusty blue.†
Chpt 2.15 *
The sky is gray-blue.†
Chpt 2.15
Out of the blue, a loud stream of water hits the grass at the top of the trail.†
Chpt 3.24
By the time the air turns pinky-blue we're on the highway.†
Chpt 5.41

Definitions:

(1) (blues as in: sings the blues)
a style of music that originated among African Americans at the beginning of the 20th century; has a "soulful" or melancholy sound from repeated use of blue notes

Blue notes are notes that are sung or played slightly lower than they would be in the major scale—especially the flattened third, fifth, and seventh degrees.
(2) (blues as in: feeling the blues)
feelings of sadness or depression
(3) (meaning too common or too rare to warrant focus)
"Blues" more commonly describes shades of the color.