Vocabulary consisting only from characters you are able to read
灰色
haiiro
grey, gray, asheniro
文書
bunsho
document, writing, letter, paperwork, note, records, archives; document, writing, letter, paperwork, note, records, archivesmix
無色
mushoku
colourless, colorless, achromaticiro
座席
zaseki
sedadlo, místomix
急に
kyuuni
(1)swiftly, rapidly, (2)suddenly, abruptly, immediately jlpt3, mix
浅緑
asamidori
light greeniro
線路
senro
line, track, roadbedmix
白黒
shirokuro
(1)black and white, monochrome, (exp,vs) (2)good and evil, right and wrong, guilt and innocence iro
いつの間にか
itsunomanika
before one knows, before one becomes aware of, unnoticed, unawaresjlpt3