From Longman Dictionary of Contemporary Englishgo bluego blueBritish EnglishCOLD if someone goes blue, their skin becomes blue because they are cold or cannot breathe properly → blue
Examples from the Corpus
go blue• I could have threatened to hold my breath until I went blue.• The baby boy went blue after his lungs became blocked.• Celia came down holding the baby, who had gone blue and stopped breathing.• You rolled around, went blue and your eyes shot up into your head.• Strictly speaking, yes, it would tend to go blue ever so slightly.• Do not put the bandage on too tight or you may find your fingers or toes going blue through lack of circulation. 