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MudBlazor theme colors change on page refresh

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I'm building a Blazor WASM app with MudBlazor and I'm using custom themes for light and dark mode.

The theme provider is in the MainLayout.razor file:

<MudThemeProvider Theme="@_theme" IsDarkMode="_isDarkMode" />

The _isDarkMode field is first initialized to null:

private MudTheme? _theme = null;

But them gets an instance in OnInitialized():

protected async override void OnInitialized(){    base.OnInitialized();    _theme = new()        {            PaletteLight = _lightPalette,            PaletteDark = _darkPalette,            LayoutProperties = new LayoutProperties()        };}

The themes are defined lower in the same file:

private readonly PaletteLight _lightPalette = new()    {        Black = "#110e2d",        AppbarText = "#424242",        AppbarBackground = "rgba(255,255,255,0.8)",        DrawerBackground = "#ffffff",        GrayLight = "#e8e8e8",        GrayLighter = "#f9f9f9",    };private readonly PaletteDark _darkPalette = new()    {        Primary = "#7e6fff",        Surface = "#1e1e2d",        Background = "#1a1a27",        BackgroundGray = "#151521",        AppbarText = "#92929f",        AppbarBackground = "rgba(26,26,39,0.8)",        DrawerBackground = "#1a1a27",        ActionDefault = "#74718e",        ActionDisabled = "#9999994d",        ActionDisabledBackground = "#605f6d4d",        TextPrimary = "#b2b0bf",        TextSecondary = "#92929f",        TextDisabled = "#ffffff33",        DrawerIcon = "#92929f",        DrawerText = "#92929f",        GrayLight = "#2a2833",        GrayLighter = "#1e1e2d",        Info = "#4a86ff",        Success = "#3dcb6c",        Warning = "#ffb545",        Error = "#ff3f5f",        LinesDefault = "#33323e",        TableLines = "#33323e",        Divider = "#292838",        OverlayLight = "#1e1e2d80",    };

The problem is, when I refresh any page, the colors change for some reason. The mode (dark/light) stays the same but the colors are a bit brighter in dark mode. Like if they got reset to some default values.

The colors I want:enter image description here

The colors I get after a refresh in the browser:enter image description here

If I now open the hamburger menu or switch the mode to light and then back to dark the colors get corrected.

What am I doing wrong that the colors are not correct right after the refresh?


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