get one’s blue—(Oxford and Cambridge) be awarded a blue cap, scarf, etc. for representing one’s university in athletics:
- He will get his blue next term and show that he’s a jolly good fellow.
get the blues—(coll.) feel sad or depressed (also: have the blues):
- His excess energy can be misdirected, especially when he gets the blues (as we all do sometimes).
See also: come out of the blue / get into a blue.