diff --git a/web/chat/chat-message-list-container.css b/web/chat/chat-message-list-container.css
index aa2e34c71..272ede021 100644
--- a/web/chat/chat-message-list-container.css
+++ b/web/chat/chat-message-list-container.css
@@ -1,12 +1,9 @@
 div.container {
-  margin-left: 400px;
-  height: 100%;
+  flex: 1;
   background-color: var(--bg);
   display: flex;
   flex-direction: column;
-  box-sizing: border-box;
 }
 div.activeContainer {
-  border: 2px solid #5989d6;
-  margin-left: 402px;
+  border: 2px solid var(--chat-message-list-active-border);
 }
diff --git a/web/chat/chat-tabs.css b/web/chat/chat-tabs.css
index 988acf011..42b8f2924 100644
--- a/web/chat/chat-tabs.css
+++ b/web/chat/chat-tabs.css
@@ -1,26 +1,23 @@
 div.container {
-  position: absolute;
   width: 400px;
-  top: 0;
-  bottom: 0;
   background-color: var(--bg);
   border-right: 1px solid var(--border-color);
   display: flex;
 }
 
 div.tabItem {
   display: flex;
   align-items: center;
 }
 
 div.tabItem svg {
   padding-right: 8px;
 }
 
 div.threadList {
   flex: 1;
   overflow-y: auto;
   display: flex;
   flex-direction: column;
   justify-content: space-between;
 }
diff --git a/web/style.css b/web/style.css
index ffa8f4450..fd5a9c084 100644
--- a/web/style.css
+++ b/web/style.css
@@ -1,245 +1,247 @@
 *,
 *:before,
 *:after {
   padding: 0;
   margin: 0;
   -ms-overflow-style: -ms-autohiding-scrollbar;
   -webkit-font-smoothing: antialiased;
   -moz-osx-font-smoothing: grayscale;
 }
 
 html {
   height: 100%;
   font-size: 62.5%;
 }
 body {
   font-family: var(--font-stack);
   background: var(--bg);
   height: 100%;
   overflow: hidden;
   font-size: 1.6rem;
 }
 a {
   text-decoration: none;
   color: #2a5db0;
   cursor: pointer;
 }
 button {
   cursor: pointer;
 }
 img,
 iframe {
   display: block;
 }
 input[type='text'],
 input[type='password'],
 textarea {
   -webkit-appearance: none;
   -moz-appearance: none;
   -webkit-border-radius: 0;
   border: 1px solid #dddddd;
   border-radius: 1px;
   font-family: var(--font-stack);
 }
 
 button svg {
   vertical-align: top;
 }
 :global(#react-root) {
   display: flex;
   flex-direction: column;
   height: 100%;
 }
 
 div.layout {
   height: 100vh;
   display: grid;
   grid-template-columns: 244px repeat(12, 1fr);
   grid-template-rows: 65px calc(100vh - 65px);
   grid-template-areas:
     'nav nav nav nav nav nav nav nav nav nav nav nav nav'
     'sBar app app app app app app app app app app app app';
 }
 
 header.header {
   background: var(--bg);
   z-index: 1;
   grid-area: nav;
 }
 div.main-header {
   height: 64px;
   background: var(--bg);
   display: flex;
   align-items: center;
   border-bottom: 1px solid var(--border-color);
 }
 div.main-header > .wordmark {
   color: var(--fg);
   padding-left: 92px;
   font-family: var(--font-logo);
   line-height: var(--line-height-text);
   font-weight: var(--semi-bold);
   font-size: var(--logo-font-22);
   margin-right: 40px;
 }
 .wordmark > a {
   color: inherit;
 }
 
 div.main-content-container {
   position: relative;
   grid-area: app;
+  display: flex;
 }
 div.main-content {
-  height: 100%;
+  display: flex;
+  flex: 1;
 }
 
 div.upper-right {
   position: absolute;
   top: 0;
   right: 0;
   padding: 15px 16px;
 }
 span.loading-indicator-loading {
   display: inline-block;
 }
 @keyframes loading-indicator-loading {
   from {
     transform: rotate(0deg);
   }
   to {
     transform: rotate(360deg);
   }
 }
 span.loading-indicator-loading-medium:after {
   content: ' ';
   display: block;
   width: 15px;
   height: 15px;
   border-radius: 50%;
   border: 3px solid #fff;
   border-color: #fff transparent #fff transparent;
   animation-name: loading-indicator-loading;
   animation-duration: 1.2s;
   animation-iteration-count: infinite;
   animation-timing-function: linear;
 }
 span.loading-indicator-loading-large:after {
   content: ' ';
   display: block;
   width: 25px;
   height: 25px;
   border-radius: 50%;
   border: 3px solid #fff;
   border-color: #fff transparent #fff transparent;
   animation-name: loading-indicator-loading;
   animation-duration: 1.2s;
   animation-iteration-count: infinite;
   animation-timing-function: linear;
 }
 span.loading-indicator-loading-small:after {
   content: ' ';
   display: block;
   width: 9px;
   height: 9px;
   border-radius: 50%;
   border: 2px solid #fff;
   border-color: #fff transparent #fff transparent;
   animation-name: loading-indicator-loading;
   animation-duration: 1.2s;
   animation-iteration-count: infinite;
   animation-timing-function: linear;
 }
 span.loading-indicator-black:after {
   border-color: #000 transparent #000 transparent;
 }
 span.loading-indicator-error {
   font-weight: bold;
   color: white;
   line-height: 0;
 }
 span.loading-indicator-error-black {
   font-weight: bold;
   color: red;
   line-height: 0;
 }
 
 .hidden {
   display: none;
 }
 .italic {
   font-style: italic;
 }
 
 span.page-loading {
   margin-top: 5px;
   margin-right: 12px;
   float: left;
 }
 span.page-error {
   margin: 15px;
   font-size: 42px;
   float: left;
   color: red;
 }
 
 div.color-picker-container {
   outline: none;
   position: relative;
 }
 div.color-picker-button {
   margin: 6px 3px;
   overflow: hidden;
   cursor: pointer;
   padding: 4px;
   display: inline-block;
   border: solid 1px darkgray;
   background: #eee;
   color: #333;
   vertical-align: middle;
   border-radius: 3px;
 }
 div.color-picker-preview {
   width: 25px;
   height: 16px;
   border: solid 1px #222;
   margin-right: 5px;
   float: left;
   z-index: 0;
 }
 div.color-picker-down-symbol {
   padding: 1px 0;
   height: 16px;
   line-height: 16px;
   float: left;
   font-size: 10px;
 }
 div.color-picker-selector {
   position: absolute;
   left: 4px;
   top: 34px;
 }
 
 @media only screen and (-webkit-min-device-pixel-ratio: 2),
   only screen and (min--moz-device-pixel-ratio: 2),
   only screen and (-o-min-device-pixel-ratio: 2/1),
   only screen and (min-device-pixel-ratio: 2),
   only screen and (min-resolution: 320dpi),
   only screen and (min-resolution: 2dppx) {
   header.header,
   header.main-header,
   div.splash-header-container,
   div.splash-top-container,
   div.splash-bottom,
   div.calendar-filters-container {
     background: var(--bg);
   }
 }
 
 @media (hover: none) {
   div.splash-header-container,
   div.splash-top-container,
   div.splash-bottom {
     background-attachment: initial;
   }
 }
diff --git a/web/theme.css b/web/theme.css
index e8ce6f9b6..6010217d5 100644
--- a/web/theme.css
+++ b/web/theme.css
@@ -1,176 +1,177 @@
 :root {
   /* Never use color values defined here directly in CSS. Add color variables to "Color Theme" below
 
      The reason we never use color values defined here directly in CSS is
 
       1. It makes changing themes from light / dark / user generated impossible.
       2. Gives the programmer context into the color being used.
       3. If our color system changes it's much easier to change color values in one place.
 
      Add a color value to the theme below, and then use it in your CSS.
      naming convention:
      - bg: background.
      - fg: foreground.
      - color: text-color
    */
   --shades-white-100: #ffffff;
   --shades-white-90: #f5f5f5;
   --shades-white-80: #ebebeb;
   --shades-white-70: #e0e0e0;
   --shades-white-60: #cccccc;
 
   --shades-black-100: #0a0a0a;
   --shades-black-90: #1f1f1f;
   --shades-black-80: #404040;
   --shades-black-70: #666666;
   --shades-black-60: #808080;
 
   --violet-dark-100: #7e57c2;
   --violet-dark-80: #6d49ab;
   --violet-dark-60: #563894;
   --violet-dark-40: #44297a;
   --violet-dark-20: #331f5c;
 
   --violet-light-100: #ae94db;
   --violet-light-80: #b9a4df;
   --violet-light-60: #d3c6ec;
   --violet-light-40: #e8e0f5;
   --violet-light-20: #f3f0fa;
 
   --success-light-10: #d5f6e3;
   --success-light-50: #6cdf9c;
   --success-primary: #00c853;
   --success-dark-50: #029841;
   --success-dark-90: #034920;
 
   --error-light-10: #feebe6;
   --error-light-50: #f9947b;
   --error-primary: #f53100;
   --error-dark-50: #b62602;
   --error-dark-90: #4f1203;
 
   --bg: var(--shades-black-100);
   --fg: var(--shades-white-100);
   --color-disabled: var(--shades-black-60);
   --text-input-bg: var(--shades-black-80);
   --text-input-color: var(--shades-white-60);
   --text-input-placeholder: var(--shades-white-60);
   --border: var(--shades-black-80);
   --error: var(--error-primary);
   --success: var(--success-dark-50);
 
   /* Color Theme */
   --btn-bg-primary: var(--violet-dark-100);
   --btn-bg-primary-hover: var(--violet-dark-80);
   --btn-bg-primary-disabled: var(--shades-black-80);
   --btn-bg-secondary: var(--shades-black-90);
   --btn-bg-secondary-hover: var(--shades-black-80);
   --btn-bg-secondary-disabled: var(--shades-black-90);
   --btn-bg-danger: var(--error-primary);
   --btn-bg-danger-hover: var(--error-dark-50);
   --btn-bg-danger-disabled: var(--shades-black-80);
   --btn-disabled-color: var(--shades-black-60);
   --chat-bg: var(--violet-dark-80);
   --chat-confirmation-icon: var(--violet-dark-100);
   --keyserver-selection: var(--violet-dark-60);
   --thread-selection: var(--violet-light-80);
   --thread-hover-bg: var(--shades-black-90);
   --thread-active-bg: var(--shades-black-80);
   --chat-timestamp-color: var(--shades-black-60);
   --tool-tip-bg: var(--shades-black-80);
   --tool-tip-color: var(--shades-white-60);
   --border-color: var(--shades-black-80);
   --calendar-chevron: var(--shades-black-60);
   --calendar-day-bg: var(--shades-black-60);
   --calendar-day-selected-color: var(--violet-dark-80);
   --community-bg: var(--shades-black-90);
   --community-settings-selected: var(--violet-dark-60);
   --unread-bg: var(--error-primary);
   --settings-btn-bg: var(--violet-dark-100);
   --modal-bg: var(--shades-black-90);
   --modal-fg: var(--shades-white-60);
   --join-bg: var(--shades-black-90);
   --help-color: var(--shades-black-60);
   --breadcrumb-color: var(--shades-white-60);
   --breadcrumb-color-unread: var(--shades-white-60);
   --btn-secondary-border: var(--shades-black-60);
   --thread-color-read: var(--shades-black-60);
   --thread-from-color-read: var(--shades-black-80);
   --thread-last-message-color-read: var(--shades-black-60);
   --relationship-button-green: var(--success-dark-50);
   --relationship-button-red: var(--error-primary);
   --relationship-button-text: var(--fg);
   --disconnected-bar-alert-bg: var(--error-dark-50);
   --disconnected-bar-alert-color: var(--shades-white-100);
   --disconnected-bar-connecting-bg: var(--shades-white-70);
   --disconnected-bar-connecting-color: var(--shades-black-100);
   --permission-color: var(--shades-white-60);
   --thread-top-bar-color: var(--shades-white-100);
   --thread-top-bar-menu-color: var(--shades-white-70);
   --thread-ancestor-keyserver-border: var(--shades-black-70);
   --thread-ancestor-color-light: var(--shades-white-70);
   --thread-ancestor-color-dark: var(--shades-black-100);
   --thread-ancestor-separator-color: var(--shades-white-60);
   --text-message-default-background: var(--shades-black-80);
   --message-action-tooltip-bg: var(--shades-black-90);
   --menu-bg: var(--shades-black-90);
   --menu-bg-light: var(--shades-black-80);
   --menu-separator-color: var(--shades-black-80);
   --menu-color: var(--shades-black-60);
   --menu-color-light: var(--shades-white-60);
   --menu-color-hover: var(--shades-white-100);
   --menu-color-dangerous: var(--error-primary);
   --menu-color-dangerous-hover: var(--error-light-50);
   --app-list-icon-read-only-color: var(--shades-black-60);
   --app-list-icon-enabled-color: var(--success-primary);
   --app-list-icon-disabled-color: var(--shades-white-80);
   --account-settings-label: var(--shades-black-60);
   --account-button-color: var(--violet-dark-100);
   --chat-thread-list-color-active: var(--shades-white-60);
   --chat-thread-list-menu-color: var(--shades-white-60);
   --chat-thread-list-menu-bg: var(--shades-black-80);
   --chat-thread-list-menu-active-color: var(--shades-white-60);
   --chat-thread-list-menu-active-bg: var(--shades-black-90);
   --search-clear-color: var(--shades-white-100);
   --search-clear-bg: var(--shades-black-70);
   --search-input-color: var(--shades-white-100);
   --search-input-placeholder: var(--shades-black-60);
   --search-icon-color: var(--shades-black-60);
   --tabs-header-active-color: var(--shades-white-100);
   --tabs-header-active-border: var(--violet-light-100);
   --tabs-header-background-color: var(--shades-black-60);
   --tabs-header-background-border: var(--shades-black-80);
   --tabs-header-background-color-hover: var(--shades-white-80);
   --tabs-header-background-border-hover: var(--shades-black-70);
   --members-modal-member-text: var(--shades-black-60);
   --members-modal-member-text-hover: var(--shades-white-100);
   --label-default-bg: var(--violet-dark-80);
   --label-default-color: var(--shades-white-80);
   --subchannels-modal-color: var(--shades-black-60);
   --subchannels-modal-color-hover: var(--shades-white-100);
   --color-selector-active-bg: var(--shades-black-80);
   --relationship-modal-color: var(--shades-black-60);
   --arrow-extension-color: var(--shades-black-60);
   --modal-close-color: var(--shades-black-60);
   --modal-close-color-hover: var(--shades-white-100);
   --add-members-group-header-color: var(--shades-black-60);
   --add-members-item-color: var(--shades-black-60);
   --add-members-item-color-hover: var(--shades-white-100);
   --add-members-item-disabled-color: var(--shades-black-80);
   --add-members-item-disabled-color-hover: var(--shades-black-60);
   --add-members-remove-pending-color: var(--error-primary);
   --add-members-remove-pending-color-hover: var(--error-light-50);
   --radio-border: var(--shades-black-70);
   --radio-color: var(--shades-white-60);
   --notification-settings-option-selected-bg: var(--shades-black-80);
   --notification-settings-option-title-color: var(--shades-white-90);
   --notification-settings-option-color: var(--shades-white-60);
   --notification-settings-option-invalid-color: var(--shades-black-80);
   --notification-settings-option-invalid-selected-color: var(--shades-black-60);
   --danger-zone-subheading-color: var(--shades-white-60);
   --danger-zone-explanation-color: var(--shades-black-60);
   --thread-creation-search-container-bg: var(--shades-black-90);
   --thread-creation-close-search-color: var(--shades-black-60);
   --thread-creation-search-item-bg-hover: var(--shades-black-80);
   --thread-creation-search-item-info-color: var(--shades-black-60);
+  --chat-message-list-active-border: #5989d6;
 }