Visual Studio Code color customizations for subdued documentation comments in an otherwise high contrast dark theme.

settings.jsonc

{
    // Applies a flat white on black theme with cyan borders and orange focus indicators.
    "workbench.colorTheme": "Default High Contrast",
    
    // Applies an orange border to the gutter instead of the current line.
    "editor.renderLineHighlight": "gutter",
    // Alternatively, you could adjust the border's alpha component.
    // "workbench.colorCustomizations": { "editor.lineHighlightBorder": "#F3851880" },
    
    // Overwrites some of the Default High Contrast colors to:
    // -    make documentation comments and tags within it (such as JavaDoc and JSDoc) a dull shade of green
    // -    give a brighter shade of green to inline comments and links within documentation comments
    // -    make type names and numeric constants slightly less green
    "editor.tokenColorCustomizations": {
        "textMateRules": [
            {
                "scope": [
                    "comment.block",
                    "comment.block.documentation punctuation",
                    "comment.block.documentation storage.type"
                ],
                "settings": {
                    "foreground": "#879B7D"
                }
            },
            {
                "scope": [
                    "comment.line",
                    "comment.block.documentation variable",
                    "comment.block.documentation entity.name.type"
                ],
                "settings": {
                    "foreground": "#8BD465"
                }
            },
            {
                "scope": [
                    "constant.numeric",
                    "constant.other.color.rgb-value",
                    "constant.other.rgb-value",
                    "support.constant.color",
                    "meta.preprocessor.numeric",
                    "keyword.other.unit"
                ],
                "settings": {
                    "foreground": "#C0CBA1"
                }
            },
            {
                "scope": [
                    "support.class",
                    "support.type",
                    "entity.name.type",
                    "entity.name.namespace",
                    "entity.name.scope-resolution",
                    "entity.name.class",
                    "storage.type.cs",
                    "storage.type.generic.cs",
                    "storage.type.modifier.cs",
                    "storage.type.variable.cs",
                    "storage.type.annotation.java",
                    "storage.type.generic.java",
                    "storage.type.java",
                    "storage.type.object.array.java",
                    "storage.type.primitive.array.java",
                    "storage.type.primitive.java",
                    "storage.type.token.java",
                    "storage.type.groovy",
                    "storage.type.annotation.groovy",
                    "storage.type.parameters.groovy",
                    "storage.type.generic.groovy",
                    "storage.type.object.array.groovy",
                    "storage.type.primitive.array.groovy",
                    "storage.type.primitive.groovy",
                    "meta.type.cast.expr",
                    "meta.type.new.expr",
                    "support.constant.math",
                    "support.constant.dom",
                    "support.constant.json",
                    "entity.other.inherited-class",
                    "punctuation.separator.namespace.ruby"
                ],
                "settings": {
                    "foreground": "#45C9B9"
                }
            }
        ]
    }
}

(Updated the file extension to .jsonc so Github highlights JSON with comments properly.)

Here is an example of what it can look like.

Note how bracket pair colorization is applied on top of the color customizations in your settings, and I do not think there's a way to specifically disable it inside documentation comments. If you don't like having a bunch of bright #FFD700 yellow brackets around type names, you could make the first bracket color #D4D4D4 and shift the defaults by one position.

{
    "workbench.colorCustomizations": {
        "editorBracketHighlight.foreground1": "#D4D4D4",
        "editorBracketHighlight.foreground2": "#FFD700",
        "editorBracketHighlight.foreground3": "#DA70D6",
        "editorBracketHighlight.foreground4": "#87CEFA"
    }
}