Can I replace "blues" with a singular form "blue" here?
Native speaker’s answer
Rebecca
No, you cannot replace "blues" with the singular form "blue" here. The word "blues" here is not a common word to use to express the meaning of technology which produces blue light. However, in this context, it is used in the plural form to indicate that all forms of "blue" should be banished. If you replaced "blues" with "blue", it would sound as though you are only referring to a singular piece of technology, so it is best to keep it plural.