How to use the color-name.hasOwnProperty function in color-name

const Color = require('color') // https://github.com/Qix-/color/
const cssKeywords = require('color-name');
const blinder = require('color-blind');

var reverseKeywords = {};
for (var key in cssKeywords) {
	if (cssKeywords.hasOwnProperty(key)) {
		reverseKeywords[cssKeywords[key]] = key;
	}
}

Color.prototype.cssname = function() {
    const reversed = reverseKeywords[this.color];
    if (reversed) {
        return reversed;
    }
    return null
}

Color.prototype.mixed = function(bg) {
    // https://stackoverflow.com/a/11615135/3909342
    if (this.alpha() !== 1) {
        let a = 1 - this.alpha();

convert.rgb.keyword = function (rgb) {
	var reversed = reverseKeywords[rgb];
	if (reversed) {
		return reversed;
	}

	var currentClosestDistance = Infinity;
	var currentClosestKeyword;

	for (var keyword in cssKeywords) {
		if (cssKeywords.hasOwnProperty(keyword)) {
			var value = cssKeywords[keyword];

			// Compute comparative distance
			var distance = comparativeDistance(rgb, value);

			// Check if its less, if so set as closest
			if (distance < currentClosestDistance) {
				currentClosestDistance = distance;
				currentClosestKeyword = keyword;
			}
		}
	}

	return currentClosestKeyword;
};

}
		},
		hsb: {
			re: /^hsb\((\d{1,3}),\s*(\d{1,3})%,\s*(\d{1,3})%\)$/,
			example: [ "hsb(120, 100%, 25%)", "hsb(0, 100%, 50%)" ],
			toRGBA: function (bits) {
				var rgb = hsvToRgb(bits);
				return [
					rgb.r, rgb.g, rgb.b, 1
				];
			}
		}
	};

	// If this is a named color, convert it to hex
	if (namedColor.hasOwnProperty(color)) {
		color = namedColor[color];
		color.forEach(function(piece, index) {
			"use strict";
			color[index] = ("0" + piece.toString(16)).slice(-2);
		});
		color = "#" + color.join('');
	}

	// Search the color definitions for a match
	for (let colorDefinition in colorDefinitions) {
		let re = colorDefinitions[colorDefinition].re;
		let processor = colorDefinitions[colorDefinition].toRGBA;
		let bits = re.exec(color);
		if (bits) {
			let channels = processor(bits);
			r = channels[0];

/* MIT license */
var colorNames = require('color-name');
var swizzle = require('simple-swizzle');

var reverseNames = {};

// create a list of reverse color names
for (var name in colorNames) {
	if (colorNames.hasOwnProperty(name)) {
		reverseNames[colorNames[name]] = name;
	}
}

var cs = module.exports = {
	to: {},
	get: {}
};

cs.get = function (string) {
	var prefix = string.substring(0, 3).toLowerCase();
	var val;
	var model;
	switch (prefix) {
		case 'hsl':
			val = cs.get.hsl(string);

convert.rgb.keyword = function (rgb) {
	var reversed = reverseKeywords[rgb];
	if (reversed) {
		return reversed;
	}

	var currentClosestDistance = Infinity;
	var currentClosestKeyword;

	for (var keyword in cssKeywords) {
		if (cssKeywords.hasOwnProperty(keyword)) {
			var value = cssKeywords[keyword];

			// Compute comparative distance
			var distance = comparativeDistance(rgb, value);

			// Check if its less, if so set as closest
			if (distance < currentClosestDistance) {
				currentClosestDistance = distance;
				currentClosestKeyword = keyword;
			}
		}
	}

	return currentClosestKeyword;
};

/* MIT license */
var colorNames = require('color-name');
var swizzle = require('simple-swizzle');

var reverseNames = {};

// create a list of reverse color names
for (var name in colorNames) {
	if (colorNames.hasOwnProperty(name)) {
		reverseNames[colorNames[name]] = name;
	}
}

var cs = module.exports = {
	to: {},
	get: {}
};

cs.get = function (string) {
	var prefix = string.substring(0, 3).toLowerCase();
	var val;
	var model;
	switch (prefix) {
		case 'hsl':
			val = cs.get.hsl(string);

* distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* MIT license */
var cssKeywords = require('color-name');

// NOTE: conversions should only return primitive values (i.e. arrays, or
//       values that give correct `typeof` results).
//       do not use box values types (i.e. Number(), String(), etc.)

var reverseKeywords = {};
for (var key in cssKeywords) {
	if (cssKeywords.hasOwnProperty(key)) {
		reverseKeywords[cssKeywords[key]] = key;
	}
}

var convert = module.exports = {
	rgb: {channels: 3, labels: 'rgb'},
	hsl: {channels: 3, labels: 'hsl'},
	hsv: {channels: 3, labels: 'hsv'},
	hwb: {channels: 3, labels: 'hwb'},
	cmyk: {channels: 4, labels: 'cmyk'},
	xyz: {channels: 3, labels: 'xyz'},
	lab: {channels: 3, labels: 'lab'},
	lch: {channels: 3, labels: 'lch'},
	hex: {channels: 1, labels: ['hex']},
	keyword: {channels: 1, labels: ['keyword']},
	ansi16: {channels: 1, labels: ['ansi16']},

/* MIT license */
var cssKeywords = require('color-name');

// NOTE: conversions should only return primitive values (i.e. arrays, or
//       values that give correct `typeof` results).
//       do not use box values types (i.e. Number(), String(), etc.)

var reverseKeywords = {};
for (var key in cssKeywords) {
	if (cssKeywords.hasOwnProperty(key)) {
		reverseKeywords[cssKeywords[key]] = key;
	}
}

var convert = module.exports = {
	rgb: {channels: 3, labels: 'rgb'},
	hsl: {channels: 3, labels: 'hsl'},
	hsv: {channels: 3, labels: 'hsv'},
	hwb: {channels: 3, labels: 'hwb'},
	cmyk: {channels: 4, labels: 'cmyk'},
	xyz: {channels: 3, labels: 'xyz'},
	lab: {channels: 3, labels: 'lab'},
	lch: {channels: 3, labels: 'lch'},
	hex: {channels: 1, labels: ['hex']},
	keyword: {channels: 1, labels: ['keyword']},
	ansi16: {channels: 1, labels: ['ansi16']},

/* MIT license */
var colorNames = require('color-name');
var swizzle = require('simple-swizzle');

var reverseNames = {};

// create a list of reverse color names
for (var name in colorNames) {
	if (colorNames.hasOwnProperty(name)) {
		reverseNames[colorNames[name]] = name;
	}
}

var cs = module.exports = {
	to: {},
	get: {}
};

cs.get = function (string) {
	var prefix = string.substring(0, 3).toLowerCase();
	var val;
	var model;
	switch (prefix) {
		case 'hsl':
			val = cs.get.hsl(string);

convert.rgb.keyword = function (rgb) {
	var reversed = reverseKeywords[rgb];
	if (reversed) {
		return reversed;
	}

	var currentClosestDistance = Infinity;
	var currentClosestKeyword;

	for (var keyword in cssKeywords) {
		if (cssKeywords.hasOwnProperty(keyword)) {
			var value = cssKeywords[keyword];

			// Compute comparative distance
			var distance = comparativeDistance(rgb, value);

			// Check if its less, if so set as closest
			if (distance < currentClosestDistance) {
				currentClosestDistance = distance;
				currentClosestKeyword = keyword;
			}
		}
	}

	return currentClosestKeyword;
};