Bottom Tab

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1

How do you change the bottom tab color & pics?
There is not an option (css)

2 
/*Change Color*/
[data-testid="tab-your_tab_Name"] svg {
    fill: red;
}

/*Change Img*/
[data-testid="tab-your_tab_Name"] > div {
background-image: url('https://i.pinimg.com/originals/70/8f/04/708f04dc59840d0b6e92ef4f4ed967f8.png');
background-size: contain;
background-repeat: no-repeat;
}

[data-testid="tab-your_tab_Name"] svg {
display: none; 
}
3

Thank you for your help!