bright_blue has definitions from the field of color
1
[ adjective ] (color) of a deep somewhat purplish blue color similar to that of a clear October sky

Examples

"October's bright blue weather"

Used in print

(Kenneth Allsop, The Bootleggers and Their Era...)

O_'_Banion was a complex and frightening man , whose bright_blue eyes stared with a kind_of frozen candour into others ' .

Related terms

chromatic

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