Background colour of "Disabled " option

[kpit-rdeshpande]

Hi,

I want to make the background colour of disabled option as "gray". How can i achieve this ?
i am using angular 1.5.
Please let me know , this is urgent.

[babarayub]

.dropdown-multiselect li>a[disabled] {
cursor: not-allowed;
color: #d8d8d8;
}