This is a custom HUD css that was created as a replacement of the Dark Theme mod available for the HUD. The reason - Dark Theme Mod is not fully compatible with most of the scripts which are written to enhance HUD.

custom-hud-vajra.css

::-webkit-scrollbar-thumb {
    background: none;
}

/* left panel back color */
.chat__chat-queue {
    background-color: #002b36;
    color: #eee8d5;
}

/* left panel elements */

li.chat__dropdown__status {
    background-color: #33555e !important;
    color: #ece6d3;
}

.chat__dropdown ul {
    border-radius: 0px;
}

.chat__chat-queue .operators img {
    border-width: 1px;
}

.chat-list__title-bar-title {
    color: #b58900;
}

.capacity__stats h4 {
    display: none;
}

.capacity__stats {
    padding: 0px !important;
}

.capacity__operators {
    background-color: #002b36 !important;
}

.operators_stats.stats_open,
.operators_stats h4 {
    background-color: #002b36;
}

button.hcfn-note-toggle-btn,
button.chat-request-chat-button {
    background-color: #073642;
    border: 0px;
}

.action-bar a {
    color: #eee8d5;
}

.capacity__operators {
    height: auto !important;
}

.stats_toggle {
    border-color: #eee8d5 !important;
}

.operators_stats.stats_open {
    border: 0px;
}

.chat-list__items p {
    color: #eee8d5;
}

.capacity__operators {
    border-color: #7b7a7a !important;
    width: 100%;
    margin-left: 0px !important;
    border-left: 0px !important;
    border-right: 0px !important;
}

.chat__chat-queue {
    min-width: 10%;
    max-width: 25%;
}

.chat-list__item.is-selected, .chat-list__item.is-selected:hover {
    background-color: #567956;
}

span.capacity__stats-label {
    color: #fff;
}

.chat__chat-queue .capacity .button {
    background-color: #073642;
    color: #fff;
    border: 0px;
    border-radius: 0px;
}

/* middle panel back color */
.chat__current-chat.chat__chat-panel {
    background-color: #f2ebc4;
}

/* right panel back color */
.chat__current-chat-meta.chat__chat-panel {
    background-color: #002b36;
    color: #eee8d5;
}

/* middle panel top */
.chat-info {
    background-color: #dfd38c;
}

.chat-toolbar, .chat-toolbar ul li {
    background-color: #9a9263;
    color: #222;
}

.capacity__operators {
    background: none !important;
}

.chat-info__badges span {
    background-color: #33555e;
    color: #ece6d3;
}


/* system generated chat messages */
/* .chat__message.chat__message__type-event.chat__message__type-transfer .chat__message__text p, */
.chat__message.chat__message__type-event.chat__message__type-transfer .chat__message__text,
/* .chat__message.chat__message__type-event.chat__message__type-chat-close p, */
.chat__message.chat__message__type-event.chat__message__type-chat-close .chat__message__text,
/* .chat__message.chat__message__type-event.chat__message__type-customer-leave p, */
.chat__message.chat__message__type-event.chat__message__type-customer-leave .chat__message__text,
.chat__message.chat__message__type-customer-event .chat__message__text,
.chat__message.chat__message__type-operator-leave .chat__message__text {
    background-color: #4f748e !important;
    border-color: #0d1a26;
    border-radius: 0px;
    background: #4f748e !important;
    color: #eee8d5;
    margin-top: 5px;
    margin-bottom: 5px;
}

/* HE chat response */
.chat__message.chat__message__from-operator.chat__message__type-message .chat__message__text,
.chat__message.chat__message__from-operator.chat__message__type-message .chat__message__text a {
    background-color: #002b3629;
    color: #222;
}

.chat__message .chat__message__text:after {
    display: none;
}

.chat__message__text {
    font-size: 16px !important;
}

.chat__message.chat__message__from-operator.chat__message__type-message .chat__message__text {
    border-radius: 15px 0px 0px 0px !important;
}

.chat__message.chat__message__from-operator.chat__message__type-message {
    margin-right: 0px;
}

/* User chat response */
.chat__message.chat__message__from-user.chat__message__type-message .chat__message__text {
    border-radius: 0px 15px 0px 0px !important;
    background-color: #ffffff8f;
}

.chat__message.chat__message__from-user.chat__message__type-message {
    margin-left: 0px;
}

/* Notes */
.chat__message.chat__message__type-event.chat__message__type-note .chat__message__text {
    background-color: #d9b90273;
    color: #222;
}

.chat__message.chat__message__type-event.chat__message__type-note .chat__message__text a {
    color: #222;
}

.chat__message.chat__message__type-event.chat__message__type-note {
    margin-right: 0px;
}

/* Right side panel elements */

.user-data-panel__user-notes__item blockquote {
    font-size: 13px;
}

.user-data-panel__user-notes__item {
    background-color: #d9b902e6 !important;
    color: #333;
}

.user-data-panel__user-notes__item:before {
    border-color: #d9b902;
}

span.chat__label {
    background-color: #33555e;
    color: #eee8d5;
}

a.user-blog-panel__button.button {
    border: 0px;
    width: 100%;
    border-radius: 0px;
    background-color: #073642;
    color: #e3dfcd;
}

input.easy-select {
    color: #ece6d3;
    font-size: 15px;
}

.chat__chat-panel-divider {
    background-color: #e5e1cf;
}

select.user-blog-panel__blog-selector {
    background-color: #33555e;
    color: #ece6d3;
    border: 0px;
}

.user-upgrades-items__item {
    color: #ece6d4;
}

.user-panel-items__item-label strong {
    color: #e9e4d2;
}

.user-upgrades-items__item strong, 
.user-upgrades-items__item i, 
.user-upgrades-items__item p, 
.user-upgrades-items__item a {
    color: #ece6d3;
}

.user-data-panel__admin-buttons a.user-data-panel__button.button {
    color: #eee8d5 !important;
}

a.user-data-panel__button.button {
    background-color: #073642;
}

.user-upgrades-items__item {
    background-color: #073642;
    border: 0px;
}

.user-upgrades-items__item strong {
    color: #fff;
}

.user-upgrades-items__item strong, 
.user-upgrades-items__item i, 
.user-upgrades-items__item p, 
.user-upgrades-items__item a {
    color: #fff;
}

a.user-data-panel__button.button {
    width: 100%;
    border: 0px;
    border-radius: 0px;
    color: #333;
}

/* Misc */

.chat__message.chat__message__type-event.chat__message__from-user.chat__message__type-typing {
    margin-left: 0px;
}

.chat__message.chat__message__from-user.chat__message__type-customer-info {
    margin-left: 0px;
}

.chat__message.chat__message__from-user.chat__message__type-customer-info .chat__message__text {
    border-radius: 0px;
    background-color: #022b36d4;
    color: #eee8d5;
}

.chat__message.chat__message__type-event.chat__message__type-note .chat__message__text {
    border-radius: 0px !important;
    margin-right: 0px;
}

.chat__message.chat__message__type-note .chat__message__text:after {
    display: none;
}

.chat__message.chat__message__type-event.chat__message__type-note {
    margin-top: 20px;
    margin-bottom: 20px;
    width: 100% !important;
    min-width: 100%;
    border-top: 6px #c4ab07 solid;
    border-radius: 0px !important;
}