HarmonyOS LoadingDialog可以自定义背景颜色吗？

参考demo：

import { LoadingDialog } from '@ohos.arkui.advanced.Dialog';
import { CustomColors } from '@kit.ArkUI';
class CustomThemeImpl implements CustomTheme {
  colors?: CustomColors;
  constructor(colors: CustomColors) {
    this.colors = colors;
  }
}
class CustomThemeColors implements CustomColors {
  fontPrimary = '#ffd0a300';
  iconSecondary = '#ffd000cd';
}
@Entry
@Component
struct Index {
  @State customTheme: CustomTheme = new CustomThemeImpl(new CustomThemeColors());
  dialogController: CustomDialogController = new CustomDialogController({
    builder: LoadingDialog({
      content: 'text',
      theme: this.customTheme,
    }),
    backgroundColor:Color.Red,
  });
  build() {
    Row() {
      Stack() {
        Column() {
          Button('dialog')
            .width(96)
            .height(40)
            .onClick(() => {
              this.dialogController.open();
            })
        }.margin({ bottom: 300 })
      }.align(Alignment.Bottom)
      .width('100%').height('100%')
    }
    .backgroundImageSize({ width: '100%', height: '100%' })
    .height('100%')
  }
}
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尝试在backgroundColor:Color.Red后面加上 backgroundBlurStyle:BlurStyle.NONE。