YOU SAID:

And if i put an o the color yellow and the color of the paper is the color of the paper

INTO JAPANESE

そして、oを黄色にすると、紙の色は紙の色になります

BACK INTO ENGLISH

And if o is yellow, the color of the paper will be the color of the paper

INTO JAPANESE

そして、oが黄色の場合、紙の色は紙の色になります

BACK INTO ENGLISH

And if o is yellow, the color of the paper will be the color of the paper