Hi Muhammed Nishad,

i think you have added perfectly css, but it's not apply because text inside .page class has some tags and that tags uses some other css or it's affecting on that tags so you have to apply css on particular tags or class/id

Hello try below code,

it will work in my side.

 .page{
        color:#0000ff !important;
    }

you can add --- style="color:white;" in corresponding tags,it is working fine in

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