Is this set of color making it look bad?

I Built This
1

I just made this project with basic functionality. Please give feedback on color choice and UI/UX.
Is there any better way to dynamically change html. Please look at line 29-32 of my javascript code. Any suggestion improving my code’s readability is welcomed. :smile:

Link

2

I like the colors but they do seem a bit to “gray” and the .random-button color doesn’t go with the rest.

3

Thank you for your reply