diff --git a/.gitignore b/.gitignore
index 6bff314..dcf94a6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ node_modules
 yarn.lock
 coverage
 .nyc_output
+/.idea
diff --git a/source/ansi-styles/index.d.ts b/source/ansi-styles/index.d.ts
new file mode 100644
index 0000000..951bb95
--- /dev/null
+++ b/source/ansi-styles/index.d.ts
@@ -0,0 +1,190 @@
+export interface CSPair {
+	/**
+	The ANSI terminal control sequence for starting this style.
+	*/
+	readonly open: string;
+
+	/**
+	The ANSI terminal control sequence for ending this style.
+	*/
+	readonly close: string;
+}
+
+export interface ColorBase {
+	/**
+	The ANSI terminal control sequence for ending this color.
+	*/
+	readonly close: string;
+
+	ansi(code: number): string;
+
+	ansi256(code: number): string;
+
+	ansi16m(red: number, green: number, blue: number): string;
+}
+
+export interface Modifier {
+	/**
+	Resets the current color chain.
+	*/
+	readonly reset: CSPair;
+
+	/**
+	Make text bold.
+	*/
+	readonly bold: CSPair;
+
+	/**
+	Emitting only a small amount of light.
+	*/
+	readonly dim: CSPair;
+
+	/**
+	Make text italic. (Not widely supported)
+	*/
+	readonly italic: CSPair;
+
+	/**
+	Make text underline. (Not widely supported)
+	*/
+	readonly underline: CSPair;
+
+	/**
+	Make text overline.
+
+	Supported on VTE-based terminals, the GNOME terminal, mintty, and Git Bash.
+	*/
+	readonly overline: CSPair;
+
+	/**
+	Inverse background and foreground colors.
+	*/
+	readonly inverse: CSPair;
+
+	/**
+	Prints the text, but makes it invisible.
+	*/
+	readonly hidden: CSPair;
+
+	/**
+	Puts a horizontal line through the center of the text. (Not widely supported)
+	*/
+	readonly strikethrough: CSPair;
+}
+
+export interface ForegroundColor {
+	readonly black: CSPair;
+	readonly red: CSPair;
+	readonly green: CSPair;
+	readonly yellow: CSPair;
+	readonly blue: CSPair;
+	readonly cyan: CSPair;
+	readonly magenta: CSPair;
+	readonly white: CSPair;
+
+	/**
+	Alias for `blackBright`.
+	*/
+	readonly gray: CSPair;
+
+	/**
+	Alias for `blackBright`.
+	*/
+	readonly grey: CSPair;
+
+	readonly blackBright: CSPair;
+	readonly redBright: CSPair;
+	readonly greenBright: CSPair;
+	readonly yellowBright: CSPair;
+	readonly blueBright: CSPair;
+	readonly cyanBright: CSPair;
+	readonly magentaBright: CSPair;
+	readonly whiteBright: CSPair;
+}
+
+export interface BackgroundColor {
+	readonly bgBlack: CSPair;
+	readonly bgRed: CSPair;
+	readonly bgGreen: CSPair;
+	readonly bgYellow: CSPair;
+	readonly bgBlue: CSPair;
+	readonly bgCyan: CSPair;
+	readonly bgMagenta: CSPair;
+	readonly bgWhite: CSPair;
+
+	/**
+	Alias for `bgBlackBright`.
+	*/
+	readonly bgGray: CSPair;
+
+	/**
+	Alias for `bgBlackBright`.
+	*/
+	readonly bgGrey: CSPair;
+
+	readonly bgBlackBright: CSPair;
+	readonly bgRedBright: CSPair;
+	readonly bgGreenBright: CSPair;
+	readonly bgYellowBright: CSPair;
+	readonly bgBlueBright: CSPair;
+	readonly bgCyanBright: CSPair;
+	readonly bgMagentaBright: CSPair;
+	readonly bgWhiteBright: CSPair;
+}
+
+export interface ConvertColor {
+	/**
+	Convert from the RGB color space to the ANSI 256 color space.
+
+	@param red - (`0...255`)
+	@param green - (`0...255`)
+	@param blue - (`0...255`)
+	*/
+	rgbToAnsi256(red: number, green: number, blue: number): number;
+
+	/**
+	Convert from the RGB HEX color space to the RGB color space.
+
+	@param hex - A hexadecimal string containing RGB data.
+	*/
+	hexToRgb(hex: string): [red: number, green: number, blue: number];
+
+	/**
+	Convert from the RGB HEX color space to the ANSI 256 color space.
+
+	@param hex - A hexadecimal string containing RGB data.
+	*/
+	hexToAnsi256(hex: string): number;
+
+	/**
+	Convert from the ANSI 256 color space to the ANSI 16 color space.
+
+	@param code - A number representing the ANSI 256 color.
+	*/
+	ansi256ToAnsi(code: number): number;
+
+	/**
+	Convert from the RGB color space to the ANSI 16 color space.
+
+	@param red - (`0...255`)
+	@param green - (`0...255`)
+	@param blue - (`0...255`)
+	*/
+	rgbToAnsi(red: number, green: number, blue: number): number;
+
+	/**
+	Convert from the RGB HEX color space to the ANSI 16 color space.
+
+	@param hex - A hexadecimal string containing RGB data.
+	*/
+	hexToAnsi(hex: string): number;
+}
+
+declare const ansiStyles: {
+	readonly modifier: Modifier;
+	readonly color: ColorBase & ForegroundColor;
+	readonly bgColor: ColorBase & BackgroundColor;
+	readonly codes: ReadonlyMap<number, number>;
+} & ForegroundColor & BackgroundColor & Modifier & ConvertColor;
+
+export default ansiStyles;
diff --git a/source/ansi-styles/index.js b/source/ansi-styles/index.js
new file mode 100644
index 0000000..e732c06
--- /dev/null
+++ b/source/ansi-styles/index.js
@@ -0,0 +1,216 @@
+const ANSI_BACKGROUND_OFFSET = 10;
+
+const wrapAnsi16 = (offset = 0) => code => `\u001B[${code + offset}m`;
+
+const wrapAnsi256 = (offset = 0) => code => `\u001B[${38 + offset};5;${code}m`;
+
+const wrapAnsi16m = (offset = 0) => (red, green, blue) => `\u001B[${38 + offset};2;${red};${green};${blue}m`;
+
+function assembleStyles() {
+	const codes = new Map();
+	const styles = {
+		modifier: {
+			reset: [0, 0],
+			// 21 isn't widely supported and 22 does the same thing
+			bold: [1, 22],
+			dim: [2, 22],
+			italic: [3, 23],
+			underline: [4, 24],
+			overline: [53, 55],
+			inverse: [7, 27],
+			hidden: [8, 28],
+			strikethrough: [9, 29]
+		},
+		color: {
+			black: [30, 39],
+			red: [31, 39],
+			green: [32, 39],
+			yellow: [33, 39],
+			blue: [34, 39],
+			magenta: [35, 39],
+			cyan: [36, 39],
+			white: [37, 39],
+
+			// Bright color
+			blackBright: [90, 39],
+			redBright: [91, 39],
+			greenBright: [92, 39],
+			yellowBright: [93, 39],
+			blueBright: [94, 39],
+			magentaBright: [95, 39],
+			cyanBright: [96, 39],
+			whiteBright: [97, 39]
+		},
+		bgColor: {
+			bgBlack: [40, 49],
+			bgRed: [41, 49],
+			bgGreen: [42, 49],
+			bgYellow: [43, 49],
+			bgBlue: [44, 49],
+			bgMagenta: [45, 49],
+			bgCyan: [46, 49],
+			bgWhite: [47, 49],
+
+			// Bright color
+			bgBlackBright: [100, 49],
+			bgRedBright: [101, 49],
+			bgGreenBright: [102, 49],
+			bgYellowBright: [103, 49],
+			bgBlueBright: [104, 49],
+			bgMagentaBright: [105, 49],
+			bgCyanBright: [106, 49],
+			bgWhiteBright: [107, 49]
+		}
+	};
+
+	// Alias bright black as gray (and grey)
+	styles.color.gray = styles.color.blackBright;
+	styles.bgColor.bgGray = styles.bgColor.bgBlackBright;
+	styles.color.grey = styles.color.blackBright;
+	styles.bgColor.bgGrey = styles.bgColor.bgBlackBright;
+
+	for (const [groupName, group] of Object.entries(styles)) {
+		for (const [styleName, style] of Object.entries(group)) {
+			styles[styleName] = {
+				open: `\u001B[${style[0]}m`,
+				close: `\u001B[${style[1]}m`
+			};
+
+			group[styleName] = styles[styleName];
+
+			codes.set(style[0], style[1]);
+		}
+
+		Object.defineProperty(styles, groupName, {
+			value: group,
+			enumerable: false
+		});
+	}
+
+	Object.defineProperty(styles, 'codes', {
+		value: codes,
+		enumerable: false
+	});
+
+	styles.color.close = '\u001B[39m';
+	styles.bgColor.close = '\u001B[49m';
+
+	styles.color.ansi = wrapAnsi16();
+	styles.color.ansi256 = wrapAnsi256();
+	styles.color.ansi16m = wrapAnsi16m();
+	styles.bgColor.ansi = wrapAnsi16(ANSI_BACKGROUND_OFFSET);
+	styles.bgColor.ansi256 = wrapAnsi256(ANSI_BACKGROUND_OFFSET);
+	styles.bgColor.ansi16m = wrapAnsi16m(ANSI_BACKGROUND_OFFSET);
+
+	// From https://github.com/Qix-/color-convert/blob/3f0e0d4e92e235796ccb17f6e85c72094a651f49/conversions.js
+	Object.defineProperties(styles, {
+		rgbToAnsi256: {
+			value: (red, green, blue) => {
+				// We use the extended greyscale palette here, with the exception of
+				// black and white. normal palette only has 4 greyscale shades.
+				if (red === green && green === blue) {
+					if (red < 8) {
+						return 16;
+					}
+
+					if (red > 248) {
+						return 231;
+					}
+
+					return Math.round(((red - 8) / 247) * 24) + 232;
+				}
+
+				return 16 +
+					(36 * Math.round(red / 255 * 5)) +
+					(6 * Math.round(green / 255 * 5)) +
+					Math.round(blue / 255 * 5);
+			},
+			enumerable: false
+		},
+		hexToRgb: {
+			value: hex => {
+				const matches = /(?<colorString>[a-f\d]{6}|[a-f\d]{3})/i.exec(hex.toString(16));
+				if (!matches) {
+					return [0, 0, 0];
+				}
+
+				let {colorString} = matches.groups;
+
+				if (colorString.length === 3) {
+					colorString = colorString.split('').map(character => character + character).join('');
+				}
+
+				const integer = Number.parseInt(colorString, 16);
+
+				return [
+					(integer >> 16) & 0xFF,
+					(integer >> 8) & 0xFF,
+					integer & 0xFF
+				];
+			},
+			enumerable: false
+		},
+		hexToAnsi256: {
+			value: hex => styles.rgbToAnsi256(...styles.hexToRgb(hex)),
+			enumerable: false
+		},
+		ansi256ToAnsi: {
+			value: code => {
+				if (code < 8) {
+					return 30 + code;
+				}
+
+				if (code < 16) {
+					return 90 + (code - 8);
+				}
+
+				let red;
+				let green;
+				let blue;
+
+				if (code >= 232) {
+					red = (((code - 232) * 10) + 8) / 255;
+					green = red;
+					blue = red;
+				} else {
+					code -= 16;
+
+					const remainder = code % 36;
+
+					red = Math.floor(code / 36) / 5;
+					green = Math.floor(remainder / 6) / 5;
+					blue = (remainder % 6) / 5;
+				}
+
+				const value = Math.max(red, green, blue) * 2;
+
+				if (value === 0) {
+					return 30;
+				}
+
+				let result = 30 + ((Math.round(blue) << 2) | (Math.round(green) << 1) | Math.round(red));
+
+				if (value === 2) {
+					result += 60;
+				}
+
+				return result;
+			},
+			enumerable: false
+		},
+		rgbToAnsi: {
+			value: (red, green, blue) => styles.ansi256ToAnsi(styles.rgbToAnsi256(red, green, blue)),
+			enumerable: false
+		},
+		hexToAnsi: {
+			value: hex => styles.ansi256ToAnsi(styles.hexToAnsi256(hex)),
+			enumerable: false
+		}
+	});
+
+	return styles;
+}
+
+const ansiStyles = assembleStyles();
+
+export default ansiStyles;
diff --git a/source/has-flag/index.d.ts b/source/has-flag/index.d.ts
new file mode 100644
index 0000000..a10218d
--- /dev/null
+++ b/source/has-flag/index.d.ts
@@ -0,0 +1,39 @@
+/**
+Check if [`argv`](https://nodejs.org/docs/latest/api/process.html#process_process_argv) has a specific flag.
+
+@param flag - CLI flag to look for. The `--` prefix is optional.
+@param argv - CLI arguments. Default: `process.argv`.
+@returns Whether the flag exists.
+
+It correctly stops looking after an `--` argument terminator.
+
+@example
+```
+// $ ts-node foo.ts -f --unicorn --foo=bar -- --rainbow
+
+// foo.ts
+import hasFlag from 'has-flag';
+
+hasFlag('unicorn');
+//=> true
+
+hasFlag('--unicorn');
+//=> true
+
+hasFlag('f');
+//=> true
+
+hasFlag('-f');
+//=> true
+
+hasFlag('foo=bar');
+//=> true
+
+hasFlag('foo');
+//=> false
+
+hasFlag('rainbow');
+//=> false
+```
+*/
+export default function hasFlag(flag: string, argv?: readonly string[]): boolean;
diff --git a/source/has-flag/index.js b/source/has-flag/index.js
new file mode 100644
index 0000000..276e5ac
--- /dev/null
+++ b/source/has-flag/index.js
@@ -0,0 +1,6 @@
+export default function hasFlag(flag, argv = Deno.args) {
+	const prefix = flag.startsWith('-') ? '' : (flag.length === 1 ? '-' : '--');
+	const position = argv.indexOf(prefix + flag);
+	const terminatorPosition = argv.indexOf('--');
+	return position !== -1 && (terminatorPosition === -1 || position < terminatorPosition);
+}
diff --git a/source/index.js b/source/index.js
index 8a3785b..e243903 100644
--- a/source/index.js
+++ b/source/index.js
@@ -1,5 +1,5 @@
-import ansiStyles from 'ansi-styles';
-import supportsColor from 'supports-color';
+import ansiStyles from './ansi-styles/index.js';
+import supportsColor from './supports-color/index.js';
 import {
 	stringReplaceAll,
 	stringEncaseCRLFWithFirstIndex
@@ -7,6 +7,7 @@ import {
 import template from './templates.js';
 
 const {stdout: stdoutColor, stderr: stderrColor} = supportsColor;
+
 const {isArray} = Array;
 
 const GENERATOR = Symbol('GENERATOR');
diff --git a/source/supports-color/browser.js b/source/supports-color/browser.js
new file mode 100644
index 0000000..153adfa
--- /dev/null
+++ b/source/supports-color/browser.js
@@ -0,0 +1,25 @@
+/* eslint-env browser */
+
+function getChromeVersion() {
+	const matches = /(Chrome|Chromium)\/(?<chromeVersion>\d+)\./.exec(navigator.userAgent);
+
+	if (!matches) {
+		return;
+	}
+
+	return Number.parseInt(matches.groups.chromeVersion, 10);
+}
+
+const colorSupport = getChromeVersion() >= 69 ? {
+	level: 1,
+	hasBasic: true,
+	has256: false,
+	has16m: false
+} : false;
+
+const supportsColor = {
+	stdout: colorSupport,
+	stderr: colorSupport
+};
+
+export default supportsColor;
diff --git a/source/supports-color/index.js b/source/supports-color/index.js
new file mode 100644
index 0000000..7de4d20
--- /dev/null
+++ b/source/supports-color/index.js
@@ -0,0 +1,154 @@
+import hasFlag from '../has-flag/index.js';
+
+import { isatty } from "https://deno.land/std@0.94.0/node/tty.ts";
+
+const env = Deno.env.toObject();
+
+let flagForceColor;
+if (hasFlag('no-color') ||
+	hasFlag('no-colors') ||
+	hasFlag('color=false') ||
+	hasFlag('color=never')) {
+	flagForceColor = 0;
+} else if (hasFlag('color') ||
+	hasFlag('colors') ||
+	hasFlag('color=true') ||
+	hasFlag('color=always')) {
+	flagForceColor = 1;
+}
+
+function envForceColor() {
+	if ('FORCE_COLOR' in env) {
+		if (env.FORCE_COLOR === 'true') {
+			return 1;
+		}
+
+		if (env.FORCE_COLOR === 'false') {
+			return 0;
+		}
+
+		return env.FORCE_COLOR.length === 0 ? 1 : Math.min(Number.parseInt(env.FORCE_COLOR, 10), 3);
+	}
+}
+
+function translateLevel(level) {
+	if (level === 0) {
+		return false;
+	}
+
+	return {
+		level,
+		hasBasic: true,
+		has256: level >= 2,
+		has16m: level >= 3
+	};
+}
+
+function _supportsColor(haveStream, {streamIsTTY, sniffFlags = true} = {}) {
+	const noFlagForceColor = envForceColor();
+	if (noFlagForceColor !== undefined) {
+		flagForceColor = noFlagForceColor;
+	}
+
+	const forceColor = sniffFlags ? flagForceColor : noFlagForceColor;
+
+	if (forceColor === 0) {
+		return 0;
+	}
+
+	if (sniffFlags) {
+		if (hasFlag('color=16m') ||
+			hasFlag('color=full') ||
+			hasFlag('color=truecolor')) {
+			return 3;
+		}
+
+		if (hasFlag('color=256')) {
+			return 2;
+		}
+	}
+
+	if (haveStream && !streamIsTTY && forceColor === undefined) {
+		return 0;
+	}
+
+	const min = forceColor || 0;
+
+	if (env.TERM === 'dumb') {
+		return min;
+	}
+
+	if (Deno.build.os === 'win32') {
+		// TODO could not find how to get the OS release in Deno, the `Deno.osRelease()` (found in std/node/os) does not seem to work
+
+		// // Windows 10 build 10586 is the first Windows release that supports 256 colors.
+		// // Windows 10 build 14931 is the first release that supports 16m/TrueColor.
+		// const osRelease = os.release().split('.');
+		// if (
+		// 	Number(osRelease[0]) >= 10 &&
+		// 	Number(osRelease[2]) >= 10586
+		// ) {
+		// 	return Number(osRelease[2]) >= 14931 ? 3 : 2;
+		// }
+
+		return 1;
+	}
+
+	if ('CI' in env) {
+		if (['TRAVIS', 'CIRCLECI', 'APPVEYOR', 'GITLAB_CI', 'GITHUB_ACTIONS', 'BUILDKITE', 'DRONE'].some(sign => sign in env) || env.CI_NAME === 'codeship') {
+			return 1;
+		}
+
+		return min;
+	}
+
+	if ('TEAMCITY_VERSION' in env) {
+		return /^(9\.(0*[1-9]\d*)\.|\d{2,}\.)/.test(env.TEAMCITY_VERSION) ? 1 : 0;
+	}
+
+	if (env.COLORTERM === 'truecolor') {
+		return 3;
+	}
+
+	if ('TERM_PROGRAM' in env) {
+		const version = Number.parseInt((env.TERM_PROGRAM_VERSION || '').split('.')[0], 10);
+
+		switch (env.TERM_PROGRAM) {
+			case 'iTerm.app':
+				return version >= 3 ? 3 : 2;
+			case 'Apple_Terminal':
+				return 2;
+			// No default
+		}
+	}
+
+	if (/-256(color)?$/i.test(env.TERM)) {
+		return 2;
+	}
+
+	if (/^screen|^xterm|^vt100|^vt220|^rxvt|color|ansi|cygwin|linux/i.test(env.TERM)) {
+		return 1;
+	}
+
+	if ('COLORTERM' in env) {
+		return 1;
+	}
+
+	return min;
+}
+
+export function createSupportsColor(stream, options = {}) {
+	const level = _supportsColor(stream, {
+		streamIsTTY: stream && stream.isTTY,
+		...options
+	});
+
+	return translateLevel(level);
+}
+
+const supportsColor = {
+	stdout: createSupportsColor({isTTY: isatty(1)}),
+	stderr: createSupportsColor({isTTY: isatty(2)})
+};
+
+export default supportsColor;