How to set a boarder color in schedule widget.

Dear all developers,

I'm trying to set up schedule widget with reffering to the following page.

as shown the below image, it seems that "color" parameter in the entry means the color for both background and boarder.

Could you let me know on how to separately set border color ( if we can, selected color as well ) in code basis ?

let newEntry = {
reason: item.PRDORD, // STRING [Primary Key]
info: item.ITMCOD, // STRING
start: item.ACTDAT, // DATETIME
end: item.ENDDAT,// DATETIME
color: "pink", // STRING
};

Thanks and Regards,

Yoshihiko