1 files changed, 8 insertions, 40 deletions
diff --git a/src/Utils.ts b/src/Utils.ts
index de3b13f63..8054245f5 100644
--- a/src/Utils.ts
+++ b/src/Utils.ts
@@ -3,6 +3,8 @@ import v5 = require("uuid/v5");
 import { ColorState } from 'react-color';
 import { Socket } from 'socket.io';
 import { Message } from './server/Message';
+import { Colors } from './client/views/global/globalEnums';
+import Color = require('color');
 
 export namespace Utils {
     export let DRAG_THRESHOLD = 4;
@@ -574,46 +576,12 @@ export function simulateMouseClick(element: Element | null | undefined, x: numbe
 }
 
 export function lightOrDark(color: any) {
-
-    // Variables for red, green, blue values
-    var r, g, b, hsp;
-
-    // Check the format of the color, HEX or RGB?
-    if (color.match(/^rgb/)) {
-
-        // If RGB --> store the red, green, blue values in separate variables
-        color = color.match(/^rgba?\((\d+),\s*(\d+),\s*(\d+)(?:,\s*(\d+(?:\.\d+)?))?\)$/);
-
-        r = color[1];
-        g = color[2];
-        b = color[3];
-    }
-    else {
-
-        // If hex --> Convert it to RGB: http://gist.github.com/983661
-        color = +("0x" + color.slice(1).replace(
-            color.length < 5 && /./g, '$&$&'));
-
-        r = color >> 16;
-        g = color >> 8 & 255;
-        b = color & 255;
-    }
-
-    // HSP (Highly Sensitive Poo) equation from http://alienryderflex.com/hsp.html
-    hsp = Math.sqrt(
-        0.299 * (r * r) +
-        0.587 * (g * g) +
-        0.114 * (b * b)
-    );
-
-    // Using the HSP value, determine whether the color is light or dark
-    if (hsp > 127.5) {
-        return 'light';
-    }
-    else {
-
-        return 'dark';
-    }
+    const nonAlphaColor = color.startsWith("#") ? (color as string).substring(0, 7) :
+    color.startsWith("rgba") ? color.replace(/,.[^,]*\)/, ")").replace("rgba", "rgb") : color;
+    const col = Color(nonAlphaColor).rgb();
+    const colsum = (col.red() + col.green() + col.blue());
+    if (colsum / col.alpha() > 400 || col.alpha() < 0.25) return Colors.DARK_GRAY;
+    else return Colors.WHITE;
 }