YOU SAID:

yellow thicken is very thicken

INTO JAPANESE

黄色が濃くなるのはとても濃い

BACK INTO ENGLISH

It is very dark that the yellow color becomes dark

INTO JAPANESE

黄色が暗くなるのはとても暗いです

BACK INTO ENGLISH

It ’s very dark that the yellow gets dark

INTO JAPANESE

黄色が暗くなるのはとても暗いです

BACK INTO ENGLISH

It ’s very dark that the yellow gets dark