from The Century Dictionary and Cyclopedia
- n. Same as basic blue (which see, under blue).
Sorry, no etymologies found.
Masses of whirling light appeared; the radiance gradually formed itself into the opal-blue spiritual eye, ringed in gold and centered with a white pentagonal star.
Once more from the opal-blue sky of autumn nights, shone the great white stars, and nature seemed wrapped in a melancholy hush.
The tall, twisted tree-stems, however, that form the background are fine and original in effect, and Mr. Richmond has caught exactly that peculiar opal-blue of the sky which is so remarkable in Greece; the purple orchids too, and daffodil and narcissi that are in the foreground are all flowers which I have myself seen at Argos.
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