Looks like the cursor is set to inherit!important in your CSS.
I’ll see if I can make the colours more customisable in the attributes this sometime week.
You’d have to change it there if possible.
.typed-cursor {
color: inherit !important;
display: inline-block;
font-family: arial, sans-serif;
opacity: 1;
-webkit-animation: blink 0.5s infinite;
animation: blink 0.5s infinite;
}