• True blue - someone loyal and faithful
• Out of the blue - unexpected (could be positive or negative)
• Blue ribbon - first rate, top prize
• Blueblood - person of noble birth, royalty
• Bluestocking - well-read or scholarly woman
• Bluebook - register of socially prominent people
• The Blues (capitalized) - popular style of music sometimes characterized by melancholy melodies and words
• Baby blues - Blue eyes (also see Bad blue words)

Bad blue

• Feeling blue - feeling sad or depressed
• Blue devils - feelings of depression
• The blues (not capitalized) - depression, state of sadness
• Blue Monday - feeling sad
• Baby blues - post-partum depression
• Singing the blues - bemoaning one's circumstances
• Blue laws - laws originally intended to enforce certain moral standards
• Blue language - profanity
• Bluenose - puritanical individual
• Into the blue - entering the unknown or escape to parts unknown
• Out of the blue - unexpected (could be positive or negative)

Labels: Color