Why I am not able to change my <div> color using <input type=color> tag

Question

https://code.sololearn.com/WcW7USiXUJLM/?ref=app

Answer 1

ok ok, you are welcome bro. Help others if possible.

Answer 2

https://code.sololearn.com/Wa5l6YMTh9cw/?ref=app

Answer 3

https://code.sololearn.com/Wvv75e9545a9/?ref=app

Answer 4

Thanks to both of you 🇮🇳Vivek🇮🇳 and Tujh Mein Rab Dikhta Hai for helping me.