Merge pull request #53 from studio-YOLO/bugfix-higher-contrast-function

Fixed bug where the function used the old color scheme

src/core/higher-contrast.js

@@ -1,13 +1,19 @@
 /**
- * Function that given a color in the format [R,G,B] converts it to grayscale in the format [R,G,B]
+ * Function that given a color in the RGB format converts it to grayscale
  * and then calculates the color (black or white) with the highest contrast.
- * @param {number[]} color Color that has to be converted and compared in the format [R,G,B]
- * @returns {number[]} Color with the higher contrast of the input color in the format [R,G,B]
+ * @param {number} r red color value
+ * @param {number} g green color value
+ * @param {number} b blue color value
+ * @returns {object} Color with the higher contrast of the input color in the format {r: value, g:value, b:value}
  */
-function higherColorContrast(color) {
-    const gray = Math.round(0.299 * color[0] + 0.587 * color[1] + 0.114 * color[2])
+function higherColorContrast(r, g, b) {
+    const gray = Math.round(0.299 * r + 0.587 * g + 0.114 * b)
     const contrastColor = gray >= 128 ? 0 : 255;
-    return [contrastColor, contrastColor, contrastColor];
+    return {
+        r: contrastColor,
+        g: contrastColor,
+        b: contrastColor
+    };
 }
 
 export default higherColorContrast;