What is the easiest way to change the button color when you click on it (Blue button -onclick-red button)

Question

for Html

Answer 1

<button style="background:blue" onclick="style.background='red'">Change</button>

Answer 2

Calvin bro , you are the beeeessst person , I had googled alot but it all had CSS , I am just starting to learn JS and you made things very very easy thanksssss 😀😀😀😀😀😀