Rena is disappointed that a blue dress doesn't appear to be the same blue at home as it did under the department store's fluorescent lights. Rena's disappointment reflects a failure of color:

constancy

Explanation:

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It means that she regrets that the color she likes does not have constancy with respect to where it will be illuminated. Because it is not the perfect blue and there are other types of details in the dress that are modified and  the perfect color don't remain.

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this is called police cynicism. i hope this .

answer; code of federal regulations;