Documentation of DecorationOptions.minimap.color is misleading - requires hex color, but suggests rgba value

Description

var jsCode = [
	'"use strict";',
	"function Person(age) {",
	"	if (age) {",
	"		this.age = age;",
	"	}",
	"}",
	"Person.prototype.getAge = function () {",
	"	return this.age;",
	"};",
].join("\n");

var editor = monaco.editor.create(document.getElementById("container"), {
	value: jsCode,
	language: "javascript",
	minimap: { enabled: true },
});

var decorations = editor.createDecorationsCollection([
	{
		range: new monaco.Range(3, 1, 5, 1),
		options: {
			isWholeLine: true,
			className: "myLineDecoration",
			minimap: {
				color: "rgba(67, 201, 249, 0.8)",
				position: monaco.editor.MinimapPosition.Inline,
			}
		},
	}
]);

.myLineDecoration {
	background: rgba(67, 201, 249, 0.8);
}

Contributor guide

Tech stack

typescriptjavascript

Domain

frontend

Issue type

documentation

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

1

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

under 1 hour

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

None

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

90

Research direction

The issue is that the documentation for DecorationOptions.minimap.color is misleading: it requires a hex color string (e.g., '#FF0000') but the example in the playground uses an rgba value, which doesn't work. To fix this, update the type definition and documentation comments to clearly specify that only hex colors are accepted. Also, correct the playground code example to use a hex color. The fix is a simple text change in the source code comments and the playground sample.