Some minor progress on the brush

sources/scripts/units/color.js

@@ -0,0 +1,46 @@
+function Color(hex = '#000000')
+{  
+  this.example = "#ff0000";
+  this.hex = hex;
+
+  this.rgb = function()
+  {
+    var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(this.hex);
+    return result ? {
+        r: parseInt(result[1], 16),
+        g: parseInt(result[2], 16),
+        b: parseInt(result[3], 16)
+    } : null;
+  }
+  
+  this.rgba = function()
+  {
+    return "rgba("+this.rgb().r+","+this.rgb().g+","+this.rgb().b+",1)";
+  }
+
+  this.floats = function()
+  {
+    var rgb = this.rgb();
+    return { r:rgb.r/255, g:rgb.g/255, b:rgb.b/255 }
+  }
+  
+  this.render = function()
+  {
+    return this.hex;
+  }
+  
+  this.rgb_to_hex = function(rgb)
+  {
+    return "#"+("0" + parseInt(rgb[0],10).toString(16)).slice(-2)+("0" + parseInt(rgb[1],10).toString(16)).slice(-2)+("0" + parseInt(rgb[2],10).toString(16)).slice(-2);
+  }
+
+  this.brightness = function()
+  {
+    return this.rgb() ? (this.rgb().r + this.rgb().g + this.rgb().b)/3 : 0;
+  }
+
+  this.style = function()
+  {
+    return this.brightness() > 150 ? "bright" : "dark";
+  }
+}