MudTable - How to set cell color

I need a way to color a selected cell, e.g. if its value is greater than something. I know how to color an entire row in a table.

    private string TblRowStyle(Planowanie thing, int index)
    {
        if (thing.tydzien == tydzien)
        {
            return $"background: #D3D3D3";
        }
        else
        {
            return "";
        }
    }

   <MudTable T="Planowanie" Items="@planowanie" FixedHeader="true" Height="@(fixed_header  ?"800px":"")" CustomHeader="true" CustomFooter="true" Dense="true" Hover="true" Bordered="true" Striped="true" Breakpoint="Breakpoint.Sm" MultiSelection="false" RowStyleFunc="@((item, idx) => TblRowStyle(item, idx))" >

is coloring the entire row in the table. However, I need to set the colour of text in the cell conditionally, when the value is greater than something else.

You can use the Style property on the the MudTd.

Here's how to do it inline.

<MudTd DataLabel="Position" Style="@(context.Position > 0? "background:green;":"background:red;")">@context.Position</MudTd>

And an example using a function to handle the logic.

<MudTable Items="@Elements.Take(4)" Hover="true" Breakpoint="Breakpoint.Sm" Loading="@_loading" LoadingProgressColor="Color.Info">
    <HeaderContent>
        <MudTh>Nr</MudTh>
        <MudTh>Sign</MudTh>
        <MudTh>Name</MudTh>
        <MudTh>Position</MudTh>
        <MudTh>Molar mass</MudTh>
    </HeaderContent>
    <RowTemplate>
        <MudTd DataLabel="Nr">@context.Number</MudTd>
        <MudTd DataLabel="Sign">@context.Sign</MudTd>
        <MudTd DataLabel="Name">@context.Name</MudTd>
        <MudTd DataLabel="Position" Style="@GetCellStyle(context.Position)">@context.Position</MudTd>
        <MudTd DataLabel="Molar mass">@context.Molar</MudTd>
    </RowTemplate>
</MudTable>

<MudSwitch T="bool" @bind-Checked="_loading">Show Loading</MudSwitch>

@code { 
    private string GetCellStyle(int position)
    {
        if(position >0){
            return "background:green;";
        }else{
            return "background:red;";
        }
    }
}

MudBlazor snippet