added details to readme

Author: siddhi-244

color-guessor/README.md

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+### Color Guessing Game
+A RGB color guessing game.It has 2 levels easy and hard. In easy level you have 3 boxes and you have to guess from those 3 boxes but in hard level you have 6 boxes.
+
+### Use of the Project:
+It is a great game to play as it is with rgb we can just see the rgb and guess the color . This can be used if get a better understanding of rgb.
+
+### Tech Stack
+* HTML5
+* CSS3
+* JAVASCRIPT
+
+
+#### Steps to Use:
+
+---
+
+- Download or clone the repository
+
+```
+git clone https://github.com/Ayushparikh-code/Web-dev-mini-projects.git
+```
+
+- Go to the directory
+- Run the index.html file
+- Start guessing!
+
+---
+
+### Screenshots
+![Screenshot (36)](https://user-images.githubusercontent.com/69195262/125189807-9b45b100-e257-11eb-9f07-82a4b65a2739.png)
+