opal blue
/ˌəʊpl ˈbluː/adjective
Of or designating a very pale blue colour as seen in some opals.
noun
1A blue aniline dye.
2An opal-blue colour.
Origin
Mid 19th century; earliest use found in Charles Mackay (1812–1889), poet and writer. From opal + blue.
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- train ferry
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