added details to index.md

Author: siddhi-244

Index.md

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 | [Battery Percentage Indicator](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/Battery%20Indicator)      |This is a battery indicator app which is used to know battery percentage of the system. |
 | [ConnectFour](https://github.com/Shauryaditya/Web-dev-mini-projects/tree/main/ConnectFour)                                  |  This is a simple game which can be played between two players.The player who connects the four bubbles first wins the game . The bubbles could be connected horizontally , vertically or diagonally.The players have to be together since multiplayer feature is not available .|
 | [Expand Button](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/Expand-Button) |It is a basic website with an expanding button on it. As we click on the button it expands and shrinks after 5 seconds. |
+| [Color Guessing Game](https://github.com/Ayushparikh-code/Web-dev-mini-projects/tree/main/color-guessor) |It is a basic color guessing game where the player is given a rgb value and he has to guess the color from that.|