NPM is added with install/i (#41)

Author: Domino987

README.md

@@ -49,7 +49,7 @@ yarn add material-ui-color-components
 
 Or using npm
 ```bash
-npm add material-ui-color-components
+npm install material-ui-color-components
 ```
 
 ## Usage
@@ -170,4 +170,4 @@ Contributions welcome! Read the [contribution guidelines](CONTRIBUTING.md) first
 
 ## License
 
-Released under MIT License
+Released under MIT License