src/vs/editor/common/viewModel/minimapTokensColorTracker.ts/MinimapTokensColorTracker/getColor
class MinimapTokensColorTracker:	public getColor(colorId: ColorId): RGBA8 {
		if (colorId < 1 || colorId >= this._colors.length) {
			// background color (basically invisible)
			colorId = ColorId.DefaultBackground;
		}
		return this._colors[colorId];
	}