Custom material palenight theme with better contrast

settings.json

"workbench.colorTheme": "Material Theme Palenight High Contrast",
  "workbench.colorCustomizations": {
    "[Material Theme*]": {
      "editor.background": "#1A1E2C",
      "banner.background": "#1A1E2C",
      "breadcrumb.background": "#1A1E2C",
      "tab.inactiveBackground": "#1A1E2C",
      "tab.activeBackground": "#1A1E2C",
      "tab.activeForeground": "#cccccc",
      "editorSuggestWidget.background": "#1A1E2C",
      "editorHoverWidget.background": "#1A1E2C",
      "quickInput.background": "#1A1E2C",
      "quickInputList.focusBackground": "#292D3E",
      "input.background": "#292D3E",
      "notifications.background": "#1A1E2C",
      "debugToolBar.background": "#1A1E2C",
      "editorGroupHeader.tabsBackground": "#1A1E2C"
    }
  },
  "editor.tokenColorCustomizations": {
    "[Material Theme*]": {
      "textMateRules": [
        {
          "scope": "variable, variable.parameter, support.variable, variable.language, support.constant, meta.definition.variable entity.name.function, meta.function-call.arguments",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "meta.embedded, source.groovy.embedded, meta.template.expression",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "punctuation.definition.entity.html",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "source.cs entity.name.type.namespace",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "meta.jsx.children, SXNested",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "source.cpp meta.block variable.other",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": "source.php support.other.namespace, source.php meta.use support.class",
          "settings": {
            "foreground": "#cccccc"
          }
        },
        {
          "scope": ["markup.fenced_code.block"],
          "settings": {
            "foreground": "#cccccc90"
          }
        },
        {
          "scope": "constant.character.escape, text.html constant.character.entity.named",
          "settings": {
            "foreground": "#cccccc"
          }
        }
      ]
    }
  }