From 9dcc3b7190083a999eb932f8ca696988ace96da7 Mon Sep 17 00:00:00 2001
From: Josh Junon <josh.junon@protonmail.com>
Date: Tue, 5 Apr 2022 11:08:18 +0200
Subject: [PATCH] update YIQ formula constants (fixes #107, ref
 chartjs/chartjs-color#2)

---
 index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.js b/index.js
index 9d6d637..c97c605 100644
--- a/index.js
+++ b/index.js
@@ -298,7 +298,7 @@ Color.prototype = {
 	isDark() {
 		// YIQ equation from http://24ways.org/2010/calculating-color-contrast
 		const rgb = this.rgb().color;
-		const yiq = (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000;
+		const yiq = (rgb[0] * 2126 + rgb[1] * 7152 + rgb[2] * 722) / 10_000;
 		return yiq < 128;
 	},