| blue-ribbon |
representing or being the best of a kind or type. |
| blue-ribbon jury |
a jury specially selected for high intelligence, education, or other elite qualities. |
| bolt from the blue |
something that occurs without warning and with shocking abruptness. |
| cobalt blue |
a deep blue pigment made from cobalt oxide. [2 definitions] |
| Kerry blue terrier |
any of a breed of small dog with a long, narrow head, a soft, wavy bluish gray coat, and an erect, docked tail. |
| once in a blue moon |
from time to time, but very rarely. |
| out of the blue |
without warning; suddenly. |
| powder blue |
a pale blue color, sometimes having a slight gray or purple cast. |
| Prussian blue |
a dark blue pigment or dye used in fabric dyeing, painting, and the like. [2 definitions] |
| robin's-egg blue |
a pale greenish blue color. |
| royal blue |
a deep vivid blue color, often with a purple or red tinge. |
| Russian blue |
a type of house cat having a soft bluish coat and green eyes. |
| sky blue |
a color like that of a clear daytime sky; light to pale blue; azure. |
| steel blue |
a metallic blue-gray color. |
| the blue |
the sky. [2 definitions] |
| true-blue |
unfailingly faithful or loyal; staunch. |