1 files changed, 36 insertions, 0 deletions
diff --git a/scripts/color.js b/scripts/color.js
new file mode 100644
index 0000000..0c52018
--- /dev/null
+++ b/scripts/color.js
@@ -0,0 +1,36 @@
+'use strict'
+
+function Color (hex = '#000000') {
+  this.hex = hex
+
+  var r = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(this.hex)
+
+  this.rgb = { r: parseInt(r[1], 16), g: parseInt(r[2], 16), b: parseInt(r[3], 16) }
+
+  this.r = this.rgb.r
+  this.g = this.rgb.g
+  this.b = this.rgb.b
+
+  this.average = parseInt((this.rgb.r + this.rgb.g + this.rgb.b) / 3)
+  this.invert = { r: 255 - this.rgb.r, g: 255 - this.rgb.g, b: 255 - this.rgb.b }
+
+  this.contrast = function (b) {
+    const lumA = 0.2126 * _linear(this.r / 256) + 0.7152 * _linear(this.g / 256) + 0.0722 * _linear(this.b / 256)
+    const lumB = 0.2126 * _linear(b.r / 256) + 0.7152 * _linear(b.g / 256) + 0.0722 * _linear(b.b / 256)
+    return lumA > lumB ? (lumA + 0.05) / (lumB + 0.05) : (lumB + 0.05) / (lumA + 0.05)
+  }
+
+  this.rgba = function () {
+    return 'rgba(' + this.rgb().r + ',' + this.rgb().g + ',' + this.rgb().b + ',1)'
+  }
+
+  this.floats = function () {
+    return { r: this.rgb.r / 255, g: this.rgb.g / 255, b: this.rgb.b / 255 }
+  }
+
+  this.toString = function () {
+    return this.hex
+  }
+
+  function _linear (v) { return (v <= 0.03928) ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4) }
+}