Unable to change characterStyles with Photoshop node api

Using the following characterStyles, only font size is working, can't change color, underline, etc.

:

const options = {
layers: [
{
edit: {},
name: "test",
text: {
content: "Testing 123",
orientation: "horizontal",
characterStyles: [
{
underline:true,
fontSize: 75,
fontCaps: "allCaps",
color: {
blue: 300,
green: 100,
red: 63
}

}
]
}
},
]
}