Html Kodu:

        <table>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
            <tr>
                <td>1</td>
                <td>2</td>
                <td>3</td>
            </tr>
        </table>

Css Kodu:

<style>

     tr:first-child{
        background-color: brown;
    }
    tr:last-child{
        background-color: rebeccapurple;
    }
    tr:nth-child(2){
        background-color: red;
    }
    tr:nth-last-child(2){
        background-color: antiquewhite;
    }
    tr:nth-child(odd){
        background-color: aqua;
    }
    tr:nth-child(even){
        background-color: green;
    }
    tr:nth-child(n+4){
        background-color: pink;
    }
    tr:nth-child(3n-1){
        background-color: fuchsia;
    } 
    tr:nth-child(3n+1){
        background-color: orange;
    }
    tr:nth-child(4n){
        background-color: black;
    }    
</style>