Player Color Customization Code

Hi there! It’s marketed that this plugin allows for color customization for the player yet it only shows light and dark options rather than choosing your own colors. Can I please have the code to for changing the player colors, including background, scroll and play button. I’ve found this code which adjusts the background but still need the color for the scroll bar and button:

.castos-player .player__body,
.castos-player .player__main{
background: #323232;
}

I really appreciate your help! Thank you, Tabitha