《虹》的羅馬音歌詞如下：
Lyrics by 李宗盛
Mizu no naka ni nami ga oshiete
Kono sora ni hikari ga sasete
Itsu no hi ka sugi ni naru
Tooi fuu ni yuku kokoro ga
Anata to boku ga michibikareta
Itsu no hi ka nareba waratteiru
Amagani sasenai
Itsu no hi mo suki ni nareru you ni
Tsumetakura niji to kakeru you ni
Tsubasa wa yukue ni hanashite
Sono chizu ni akai aoi niji yo
Mata chikazukete yuku no ka wakaru koto ga aru yo
Ashiato ga yume mada terasu mono darou
Atsuki sora o onegai mashite iimashita koto no oto ga fukarete...
Sono sora no e ni hikari ga terasu niji miru yo
Hito no kokoro o kawashita...ai yo...koi yo...kono chikara o tsuzuku niji...wo...niji...wo...kono niji made...to omou yo...o...to...to...omou yo...o...o...wo...wo...wo...wo...wo...o...o...o...o!
羅馬音僅供參考，建議用軟體對照翻譯歌詞。