diff --git a/files/classes/chats.py b/files/classes/chats.py
index d7790d79c..fb44bc507 100644
--- a/files/classes/chats.py
+++ b/files/classes/chats.py
@@ -2,7 +2,7 @@ import time
 from flask import g
 
 from sqlalchemy import Column, ForeignKey
-from sqlalchemy.orm import relationship
+from sqlalchemy.orm import deferred, relationship
 from sqlalchemy.sql.sqltypes import *
 
 from files.classes import Base
@@ -14,6 +14,7 @@ class Chat(Base):
 	id = Column(Integer, primary_key=True)
 	name = Column(String)
 	created_utc = Column(Integer)
+	css = deferred(Column(String))
 
 	@property
 	@lazy
diff --git a/files/routes/chats.py b/files/routes/chats.py
index 3b160df67..dae1a923b 100644
--- a/files/routes/chats.py
+++ b/files/routes/chats.py
@@ -112,9 +112,9 @@ def chat(v, chat_id):
 	orgy = get_running_orgy(v, chat_id)
 	if orgy:
 		orgies = g.db.query(Orgy).filter_by(chat_id=chat_id).order_by(Orgy.start_utc).all()
-		return render_template("orgy.html", v=v, messages=displayed_messages, chat=chat, sorted_memberships=sorted_memberships, muting_chat=muting_chat, orgy=orgy, orgies=orgies, membership=membership)
+		return render_template("orgy.html", v=v, messages=displayed_messages, chat=chat, sorted_memberships=sorted_memberships, muting_chat=muting_chat, orgy=orgy, orgies=orgies, membership=membership, chat_css=chat.css)
 
-	return render_template("chat.html", v=v, messages=displayed_messages, chat=chat, sorted_memberships=sorted_memberships, muting_chat=muting_chat, membership=membership)
+	return render_template("chat.html", v=v, messages=displayed_messages, chat=chat, sorted_memberships=sorted_memberships, muting_chat=muting_chat, membership=membership, chat_css=chat.css)
 
 
 @app.post("/chat/<int:chat_id>/name")
@@ -188,6 +188,63 @@ def mute_chat(v, chat_id):
 
 	return {"message": msg}
 
+@app.get("/chat/<int:chat_id>/custom_css")
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400)
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400, key_func=get_ID)
+@auth_required
+def chat_custom_css_get(v, chat_id):
+	chat = g.db.get(Chat, chat_id)
+	if not chat:
+		abort(404, "Chat not found!")
+
+	if v.id != chat.owner_id:
+		abort(403, "Only the chat owner can change its custom css!")
+
+	return render_template("chat_css.html", v=v, chat=chat)
+
+@app.post("/chat/<int:chat_id>/custom_css")
+@limiter.limit('1/second', scope=rpath)
+@limiter.limit('1/second', scope=rpath, key_func=get_ID)
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400)
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400, key_func=get_ID)
+@auth_required
+def chat_custom_css_post(v, chat_id):
+	chat = g.db.get(Chat, chat_id)
+	if not chat:
+		abort(404, "Chat not found!")
+
+	if v.id != chat.owner_id:
+		abort(403, "Only the chat owner can change its custom css!")
+
+	if v.shadowbanned: abort(400)
+
+	css = request.values.get('css', '').strip()
+
+	if len(css) > CSS_LENGTH_LIMIT:
+		abort(400, f"Chat CSS is too long (max {CSS_LENGTH_LIMIT} characters)")
+
+	valid, error = validate_css(css)
+	if not valid:
+		abort(400, error)
+
+	chat.css = css
+	g.db.add(chat)
+
+	return {"message": "Chat Custom CSS successfully updated!"}
+
+
+@app.get("/chat/<int:chat_id>/css")
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400)
+@limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400, key_func=get_ID)
+@auth_required
+def chat_css(v, chat_id):
+	chat = g.db.query(Chat.css).filter_by(id=chat_id).one_or_none()
+	if not chat:
+		abort(404, "Chat not found!")
+	resp = make_response(chat.css or "")
+	resp.headers.add("Content-Type", "text/css")
+	return resp
+
 @app.get("/chat/<int:chat_id>/orgies")
 @limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400)
 @limiter.limit(DEFAULT_RATELIMIT, deduct_when=lambda response: response.status_code < 400, key_func=get_ID)
diff --git a/files/templates/chat.html b/files/templates/chat.html
index 2ca4467c1..733e3730c 100644
--- a/files/templates/chat.html
+++ b/files/templates/chat.html
@@ -17,8 +17,7 @@
 						<b class="mt-2 mb-2 ml-1 text-small toggleable d-md-none" style="display:inline-block">{{chat.name}}</b> 
 
 						{% if v.id == chat.owner_id %}
-							<button class="px-2 toggleable" type="button" data-nonce="{{g.nonce}}" data-onclick="toggleElement('chat-name-form', 'chat-name')">
-								<i class="fas fa-pen text-small text-muted"></i>
+							<button class="chat-control fas fa-pen text-small text-muted px-2 toggleable" type="button" data-nonce="{{g.nonce}}" data-onclick="toggleElement('chat-name-form', 'chat-name')">
 							</button>
 
 							<form id="chat-name-form" class="d-none mt-2" action="/chat/{{chat.id}}/name" method="post">
@@ -27,7 +26,9 @@
 								<button type="submit" class="btn btn-primary" style="margin-top:-5px">Save</button>
 							</form>
 
-							<a href="/chat/{{chat.id}}/orgies" class="orgy-control fas fa-tv text-muted ml-2"></a>
+							<a href="/chat/{{chat.id}}/orgies" class="chat-control fas fa-tv text-muted mx-2"></a>
+
+							<a href="/chat/{{chat.id}}/custom_css" class="chat-control fas fa-palette text-muted ml-2"></a>
 						{% else %}
 							<button class="px-2" type="button" data-nonce="{{g.nonce}}" data-bs-toggle="tooltip" title="{% if muting_chat %}Unmute (do it){% else %}Mute (don't do it){% endif %}" data-nonce="{{g.nonce}}" data-onclick="postToastReload(this, '/chat/{{chat.id}}/toggle_mute')">
 								<i class="fas fa-bell-slash {% if muting_chat %}text-danger{% else %}text-muted{% endif %}"></i>
diff --git a/files/templates/chat_css.html b/files/templates/chat_css.html
new file mode 100644
index 000000000..3608e5fb9
--- /dev/null
+++ b/files/templates/chat_css.html
@@ -0,0 +1,29 @@
+{% extends "default.html" %}
+
+{% block pagetitle %}Chat CSS{% endblock %}
+
+{% block content %}
+	<div class="settings my-5 mx-3">
+		<section>
+			<a href="/chat/{{chat.id}}">
+				<i class="fas fa-long-arrow-left mr-2"></i>Go back to chat
+			</a>
+			<h2 class="mt-4">Chat Custom CSS</h2>
+			<div class="settings-section rounded mb-0">
+				<p class="text-small text-muted pt-2 pl-3">Edit your chat's custom CSS</p>
+				<div class="body d-lg-flex border-bottom">
+					<div class="w-lg-100">
+						<form id="chat-custom-css" action="/chat/{{chat.id}}/custom_css" method="post" data-nonce="{{g.nonce}}" data-onsubmit="sendFormXHR(this)">
+							<input hidden name="formkey" value="{{v|formkey}}" class="notranslate" translate="no">
+							<textarea autocomplete="off" class="form-control rounded" id="css-textarea" placeholder="Custom CSS" rows="3" name="css" form="chat-custom-css" maxlength="{{CSS_LENGTH_LIMIT}}">{% if chat.css %}{{chat.css}}{% endif %}</textarea>
+							<small>Limit of {{CSS_LENGTH_LIMIT}} characters</small>
+							<div class="d-flex mt-2">
+								<input autocomplete="off" id="submit-btn" class="btn btn-primary ml-auto" type="submit" value="Save">
+							</div>
+						</form>
+					</div>
+				</div>
+			</div>
+		</section>
+	</div>
+{% endblock %}
diff --git a/files/templates/orgy.html b/files/templates/orgy.html
index 2453f6cf3..9c655e420 100644
--- a/files/templates/orgy.html
+++ b/files/templates/orgy.html
@@ -15,7 +15,9 @@
 			<b class="mt-2 mb-2 ml-1 text-small d-md-none" style="display:inline-block">{{orgy.title}}</b> 
 
 			{% if v.id == chat.owner_id %}
-				<a href="/chat/{{chat.id}}/orgies" class="orgy-control fas fa-tv text-muted ml-2"></a>
+				<a href="/chat/{{chat.id}}/orgies" class="chat-control fas fa-tv text-muted mx-2"></a>
+
+				<a href="/chat/{{chat.id}}/custom_css" class="chat-control fas fa-palette text-muted ml-2"></a>
 			{% else %}
 				<button class="px-2" type="button" data-nonce="{{g.nonce}}" data-bs-toggle="tooltip" title="{% if muting_chat %}Unmute (do it){% else %}Mute (don't do it){% endif %}" data-nonce="{{g.nonce}}" data-onclick="postToastReload(this, '/chat/{{chat.id}}/toggle_mute')">
 					<i class="fas fa-bell-slash {% if muting_chat %}text-danger{% else %}text-muted{% endif %}"></i>
diff --git a/files/templates/util/html_head.html b/files/templates/util/html_head.html
index 677555c41..88c2a9b55 100644
--- a/files/templates/util/html_head.html
+++ b/files/templates/util/html_head.html
@@ -151,6 +151,10 @@
 	{% if v and (v.css or v.background) and not request.path.startswith('/settings') %}
 		<link rel="stylesheet" href="/@{{v.username}}/css">
 	{% endif %}
+
+	{% if chat_css %}
+		<link rel="stylesheet" href="/chat/{{chat.id}}/css">
+	{% endif %}
 {% endmacro %}
 
 {% macro seo() %}
diff --git a/migrations/20240807-add-chat-css.sql b/migrations/20240807-add-chat-css.sql
new file mode 100644
index 000000000..b1eb29480
--- /dev/null
+++ b/migrations/20240807-add-chat-css.sql
@@ -0,0 +1 @@
+alter table chats add column css character varying(20000);