RGB To Hex Conversion

Author: PaulNoth

README.md

@@ -21,3 +21,4 @@ My Codewars solutions in various languages.
  - [Not so black box (8 kyu)](https://www.codewars.com/kata/not-so-black-box) [[solution](https://github.com/PaulNoth/codewars/blob/master/not-so-black-box/solution.md)] [[javascript](https://github.com/PaulNoth/codewars/blob/master/not-so-black-box/kata.js)]  
  - [Arguments to Binary addition (8 kyu)](https://www.codewars.com/kata/arguments-to-binary-addition) [[solution](https://github.com/PaulNoth/codewars/blob/master/arguments-to-binary-addition/solution.md)] [[javascript](https://github.com/PaulNoth/codewars/blob/master/arguments-to-binary-addition/kata.js)]  
  - [Mr. Freeze (8 kyu)](https://www.codewars.com/kata/mr-freeze) [[solution](https://github.com/PaulNoth/codewars/blob/master/mr-freeze/solution.md)] [[javascript](https://github.com/PaulNoth/codewars/blob/master/mr-freeze/kata.js)]  
+ - [RGB To Hex Conversion (5 kyu)](https://www.codewars.com/kata/rgb-to-hex-conversion) [[solution](https://github.com/PaulNoth/codewars/blob/master/rgb-to-hex-conversion/solution.md)] [[javascript](https://github.com/PaulNoth/codewars/blob/master/rgb-to-hex-conversion/kata.js)]  

rgb-to-hex-conversion/kata.js

@@ -0,0 +1,12 @@
+function rgb(r, g, b) {
+  const convert = function(val) {
+    if(val < 0) {
+      return '00';
+    }
+    if(val > 255) {
+      return 'FF';
+    }
+    return (val > 15 ? val.toString(16) : '0' + val.toString(16)).toUpperCase();
+  }
+  return convert(r) + convert(g) + convert(b); 
+}

rgb-to-hex-conversion/solution.md

@@ -0,0 +1,3 @@
+### RGB To Hex Conversion
+
+Used built-in conversion function. Only need to take care when the color value is out of bounds `0` and `255`.