Colour selector and image editor of Htmleditor

Radzen.Blazor Components
1

1.Can i select colour by selecting Small colourful squares？

2.Can i active insert image dialogue by DoubleClick the image which in the editor field？

2

You can add a list of predefined colors like this:

<RadzenHtmlEditor @bind-Value=@value style="height: 500px;" UploadUrl="upload/image">
    <RadzenHtmlEditorUndo />
    <RadzenHtmlEditorRedo />
    <RadzenHtmlEditorSeparator />
    <RadzenHtmlEditorBold />
    <RadzenHtmlEditorItalic />
    <RadzenHtmlEditorUnderline />
    <RadzenHtmlEditorStrikeThrough />
    <RadzenHtmlEditorSeparator />
    <RadzenHtmlEditorColor>
        <RadzenColorPickerItem Value="ff2800" />
        <RadzenColorPickerItem Value="fe9300" />
        <RadzenColorPickerItem Value="fefb00" />
        <RadzenColorPickerItem Value="02f900" />
        <RadzenColorPickerItem Value="00fdff" />
        <RadzenColorPickerItem Value="0433ff" />
        <RadzenColorPickerItem Value="ff40ff" />
        <RadzenColorPickerItem Value="942292" />
        <RadzenColorPickerItem Value="aa7942" />
        <RadzenColorPickerItem Value="ffffff" />
        <RadzenColorPickerItem Value="000000" />
        <RadzenColorPickerItem Value="53d5fd" />
        <RadzenColorPickerItem Value="73a7fe" />
        <RadzenColorPickerItem Value="874efe" />
        <RadzenColorPickerItem Value="d357fe" />
        <RadzenColorPickerItem Value="ed719e" />
        <RadzenColorPickerItem Value="ff8c82" />
        <RadzenColorPickerItem Value="ffa57d" />
        <RadzenColorPickerItem Value="ffc677" />
        <RadzenColorPickerItem Value="fff995" />
        <RadzenColorPickerItem Value="ebf38f" />
        <RadzenColorPickerItem Value="b1dd8c" />
    </RadzenHtmlEditorColor>
    <RadzenHtmlEditorBackground />
    <RadzenHtmlEditorRemoveFormat />
</RadzenHtmlEditor>

@code {
    string value = @"<h1>Hello World!</h1>";
}

No, this isn't currently supported.