The spelling of the phrase "red yellows" can be explained through IPA phonetic transcription. "Red" is pronounced as /rɛd/, with the 'e' having an open mid-front vowel sound, whereas "yellows" is spelled /ˈjɛloʊz/ with the 'e' having a diphthong sound of "eɪ" in addition to the 'o' having an "oʊ" sound. When combined together, "red yellows" is pronounced as /rɛd ˈjɛloʊz/, with a clear differentiation in sound between the two words.