Use a blue platform badge icon

Author: Robert Gummesson

README.md

@@ -3,7 +3,7 @@ Build Time Analyzer for Xcode
 
 [![Build Status](https://travis-ci.org/RobertGummesson/BuildTimeAnalyzer-for-Xcode.svg?branch=master)](https://travis-ci.org/RobertGummesson/BuildTimeAnalyzer-for-Xcode)
 [![Swift](https://img.shields.io/badge/Swift-3.0-orange.svg)](https://swift.org)
-[![Platform](https://img.shields.io/badge/platform-osx-lightgrey.svg)](https://github.com/RobertGummesson/BuildTimeAnalyzer-for-Xcode)
+[![Platform](https://img.shields.io/badge/platform-osx-blue.svg)](https://github.com/RobertGummesson/BuildTimeAnalyzer-for-Xcode)
 [![Xcode](https://img.shields.io/badge/Xcode-8.2-blue.svg)](https://developer.apple.com/xcode)
 [![MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)