index.js

'use strict';

var styles = module.exports = {
	modifiers: {
		reset: [0, 0],
		bold: [1, 22], // 21 isn't widely supported and 22 does the same thing
		dim: [2, 22],
		italic: [3, 23],
		underline: [4, 24],
		inverse: [7, 27],
		hidden: [8, 28],
		strikethrough: [9, 29]
	},
	colors: {
		black: [30, 39],
		red: [31, 39],
		green: [32, 39],
		yellow: [33, 39],
		blue: [34, 39],
		magenta: [35, 39],
		cyan: [36, 39],
		white: [37, 39],
		gray: [90, 39]
	},
	bgColors: {
		bgBlack: [40, 49],
		bgRed: [41, 49],
		bgGreen: [42, 49],
		bgYellow: [43, 49],
		bgBlue: [44, 49],
		bgMagenta: [45, 49],
		bgCyan: [46, 49],
		bgWhite: [47, 49]
	}
};

// fix humans
styles.colors.grey = styles.colors.gray;

Object.keys(styles).forEach(function (groupName) {
	var group = styles[groupName];

	Object.keys(group).forEach(function (styleName) {
		var style = group[styleName];

		styles[styleName] = group[styleName] = {
			open: '\u001b[' + style[0] + 'm',
			close: '\u001b[' + style[1] + 'm'
		};
	});

	Object.defineProperty(styles, groupName, {
		value: group,
		enumerable: false
	});
});