Sentence:  She watches the yachts in the creamy evening <WSD>blues</WSD>. 
Meaning of the word marked with <WSD> tags:  The colour of the clear sky or the deep sea, between green and violet in the visible spectrum, and one of the primary additive colours for transmitted light; the colour obtained by subtracting red and green from white light using magenta and cyan filters; or any colour resembling this.