Fix Discord badge's color

Author: Panquesito7

README.md

@@ -3,7 +3,7 @@
 [![Gitter chat](https://img.shields.io/badge/Chat-Gitter-ff69b4.svg?label=Chat&logo=gitter&style=flat-square)](https://gitter.im/TheAlgorithms) 
 [![contributions welcome](https://img.shields.io/static/v1.svg?label=Contributions&message=Welcome&color=0059b3&style=flat-square)](https://github.com/TheAlgorithms/Ruby/blob/master/CONTRIBUTING.md) 
 ![Repository size](https://img.shields.io/github/repo-size/TheAlgorithms/Algorithms-Explanation.svg?label=Repo%20size&style=flat-square) 
-[![Discord chat](https://img.shields.io/discord/808045925556682782.svg?logo=discord&colorB=7289DA&style=flat-square)](https://discord.gg/c7MnfGFGa6)
+[![Discord chat](https://img.shields.io/discord/808045925556682782.svg?logo=discord&colorB=5865F2&style=flat-square)](https://discord.gg/c7MnfGFGa6)
 
 Popular algorithms explained in simple language with examples and links to their implementation in various programming languages and other required resources.