diff --git a/src/Window.hpp b/src/Window.hpp
index 216773fb..6969213a 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -4,6 +4,9 @@
 #include "events/Events.hpp"
 #include "helpers/SubsurfaceTree.hpp"
 
+struct SWindowSpecialRenderData {
+    float alpha = 1.f;
+};  
 
 class CWindow {
 public:
@@ -76,6 +79,8 @@ public:
     // For hidden windows and stuff
     bool            m_bHidden = false;
 
+    // Special render data, rules, etc
+    SWindowSpecialRenderData m_sSpecialRenderData;
 
     // For the list lookup
     bool operator==(const CWindow& rhs) {
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 01e87138..f321651c 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -259,6 +259,7 @@ void CConfigManager::handleWindowRule(const std::string& command, const std::str
     // verify we support a rule
     if (RULE != "float" 
         && RULE != "tile"
+        && RULE.find("opacity") != 0
         && RULE.find("move") != 0
         && RULE.find("size") != 0
         && RULE.find("pseudo") != 0
diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index 9851a76b..4887560c 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -86,6 +86,12 @@ void Events::listener_mapWindow(void* owner, void* data) {
             PWINDOW->m_bIsFloating = false;
         } else if (r.szRule.find("pseudo") == 0) {
             PWINDOW->m_bIsPseudotiled = true;
+        } else if (r.szRule.find("opacity") == 0) {
+            try {
+                PWINDOW->m_sSpecialRenderData.alpha = std::stof(r.szRule.substr(r.szRule.find_first_of(' ') + 1));
+            } catch(std::exception& e) {
+                Debug::log(ERR, "Opacity rule \"%s\" failed with: %s", r.szRule.c_str(), e.what());
+            }
         }
     }
 
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 7b8a0e40..3315034f 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -92,11 +92,14 @@ void CHyprRenderer::renderWindow(CWindow* pWindow, SMonitor* pMonitor, timespec*
     renderdata.fadeAlpha = pWindow->m_fAlpha;
     renderdata.alpha = pWindow == g_pCompositor->m_pLastWindow ? g_pConfigManager->getFloat("decoration:active_opacity") : g_pConfigManager->getFloat("decoration:inactive_opacity");
 
+    // apply window special data
+    renderdata.alpha *= pWindow->m_sSpecialRenderData.alpha;
+
     wlr_surface_for_each_surface(g_pXWaylandManager->getWindowSurface(pWindow), renderSurface, &renderdata);
 
     // border
     if (decorate && !pWindow->m_bX11DoesntWantBorders)
-        drawBorderForWindow(pWindow, pMonitor, pWindow->m_fAlpha);
+        drawBorderForWindow(pWindow, pMonitor, pWindow->m_fAlpha * renderdata.alpha);
 
     if (pWindow->m_bIsX11) {
         if (pWindow->m_uSurface.xwayland->surface) {