Having a blue-gray or grayish-blue color; resembling the color of a clear sky or slate.
From Latin caesius (meaning 'blue' or 'bluish-gray'). This color term appears in classical Latin texts describing eyes, fabrics, or sky, and was borrowed into English scientific vocabulary.
Caesar himself was described as having 'caesious eyes' in classical texts—blue-gray eyes that marked him as distinctive, so this color word literally comes from describing ancient Rome's most famous person's appearance.
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