1. blue vitriol

noun. Hydrated blue crystalline form of copper sulfate.
Synonyms
chalcanthite cupric sulphate cupric sulfate blue stone copper sulfate blue copperas copper sulphate
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2. dark-blue

adjective. Of a dark shade of blue.
Synonyms
chromatic
Antonyms
achromatic uncolored

3. blue

adjective. (ˈbluː) Of the color intermediate between green and violet; having a color similar to that of a clear unclouded sky.
Synonyms
chromatic bluish blueish
Antonyms
achromatic happy light lively
Etymology
blue (English)
blewe (Middle English (1100-1500))

4. blue

adjective. (ˈbluː) Used to signify the Union forces in the American Civil War (who wore blue uniforms).
Synonyms
northern
Antonyms
southern enlightenment
Etymology
blue (English)
blewe (Middle English (1100-1500))

5. blue

noun. (ˈbluː) Blue color or pigment; resembling the color of the clear sky in the daytime.
Synonyms
chromatic colour azure turquoise spectral colour sapphire aquamarine blueness cobalt blue navy blue lazuline Prussian blue spectral color royal blue steel blue navy powder blue ultramarine chromatic color sky-blue cerulean peacock blue purplish blue aqua dark blue greenish blue
Antonyms
achromatic color upwards imperfect lowland rising
Etymology
blue (English)
blewe (Middle English (1100-1500))

6. blue

noun. (ˈbluː) Blue clothing.
Synonyms
clothing wearable wear habiliment vesture article of clothing
Antonyms
refined worsen ascending upwardly upward
Etymology
blue (English)
blewe (Middle English (1100-1500))

7. blue

noun. (ˈbluː) Any organization or party whose uniforms or badges are blue.
Synonyms
Union Army organization organisation
Antonyms
operative raised safe euphoric
Etymology
blue (English)
blewe (Middle English (1100-1500))

8. blue

adjective. (ˈbluː) Characterized by profanity or cursing.
Synonyms
profane blasphemous dirty
Antonyms
clean colorful placable unalarming
Etymology
blue (English)
blewe (Middle English (1100-1500))

9. blue

adjective. (ˈbluː) Filled with melancholy and despondency.
Synonyms
downhearted low gloomy down in the mouth down downcast grim low-spirited dejected depressed dispirited
Antonyms
elated unsarcastic pleasant valuable good
Etymology
blue (English)
blewe (Middle English (1100-1500))

10. blue

noun. (ˈbluː) The sky as viewed during daylight.
Synonyms
blue sky blue air sky wild blue yonder
Antonyms
thick spirited tasteless spiritless immobile
Etymology
blue (English)
blewe (Middle English (1100-1500))
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