converse.js/sass/_lists.scss

#conversejs {
    .list-container {
        text-align: left;
        padding: 0.3em 0;

        .list-toggle {
            font-family: $heading-font; 
            display: block;
            color: $text-color;
            padding: 0 0 0.5rem 0;
            &:hover {
                color: $dark-gray-color;
            }
        }
    }

    .items-list {
        text-align: left;

        .list-item {
            border: none;
            clear: both;
            color: $text-color;
            display: block;
            height: 2em;
            overflow: hidden;
            padding-top: 0.5em;
            text-shadow: 0 1px 0 $text-shadow-color;
            word-wrap: break-word;

            .list-item-link {
                &:hover {
                    color: $dark-link-color;
                }
                font-size: $font-size;
                line-height: $font-size;
                padding-right: 0.5em;
                overflow: hidden;
                white-space: nowrap;
                text-overflow: ellipsis;
            }

            .list-item-action {
                opacity: 0;
                font-size: $font-size-tiny;
                padding: 0;
                margin: 0 0 0 0.4em;
                width: 1.6em;
                &:before {
                    font-size: $font-size;
                }
                &.button-on {
                    color: $link-color;
                    &:hover {
                        color: $dark-link-color;
                    }
                }
                color: $subdued-color;
                &:hover {
                    color: $gray-color;
                    opacity: 1;
                }
            }

            &.open {
                background-color: $controlbox-head-color;
                &:hover {
                    background-color: $controlbox-head-color !important;
                }
                a {
                    color: white;
                }
                .list-item-link {
                    &:hover {
                        color: white;
                    }
                }
                .list-item-action {
                    color: lighten($lightest-blue, 25%);
                    &:hover {
                        color: white;
                    }
                }
                .fa-circle {
                    color: lighten($green, 25%);
                }
                .fa-minus-circle {
                    color: lighten($red, 15%);
                }
                .fa-dot-circle-o {
                    color: lighten($orange, 15%);
                }
                .far .fa-circle,
                .fa-times-circle {
                    color: lighten($subdued-color, 25%);
                }
            }

            &:hover {
                background-color: lighten($controlbox-head-color, 45%);
                .fa, .far, .fas {
                    opacity: 1;
                }
            }
            &.unread-msgs {
                .msgs-indicator {
                    border-radius: 10%;
                    opacity: 1;
                }
                .available-room,
                .open-room {
                    width: 100%;
                    font-weight: bold;
                }
            }
        }
    }
}