diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index fb44b541..83fcdfcb 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -604,7 +604,7 @@ void CCompositor::focusWindow(CWindow* pWindow, wlr_surface* pSurface) {
 
     // we need to make the PLASTWINDOW not equal to m_pLastWindow so that RENDERDATA is correct for an unfocused window
     if (windowValidMapped(PLASTWINDOW)) {
-        updateWindowBorderColor(PLASTWINDOW);
+        updateWindowAnimatedDecorationValues(PLASTWINDOW);
 
         if (PLASTWINDOW->m_bIsX11) {
             wlr_seat_keyboard_notify_clear_focus(m_sSeat.seat);
@@ -627,7 +627,7 @@ void CCompositor::focusWindow(CWindow* pWindow, wlr_surface* pSurface) {
     const auto POINTERLOCAL = g_pInputManager->getMouseCoordsInternal() - pWindow->m_vRealPosition.goalv();
     wlr_seat_pointer_notify_enter(m_sSeat.seat, PWINDOWSURFACE, POINTERLOCAL.x, POINTERLOCAL.y);
 
-    updateWindowBorderColor(pWindow);
+    updateWindowAnimatedDecorationValues(pWindow);
 
     // Send an event
     g_pEventManager->postEvent(SHyprIPCEvent("activewindow", g_pXWaylandManager->getAppIDClass(pWindow) + "," + pWindow->m_szTitle));
@@ -1134,25 +1134,50 @@ SMonitor* CCompositor::getMonitorInDirection(const char& dir) {
     return nullptr;
 }
 
-void CCompositor::updateAllWindowsBorders() {
+void CCompositor::updateAllWindowsAnimatedDecorationValues() {
     for (auto& w : m_vWindows) {
         if (!w->m_bIsMapped)
             continue;
 
-        updateWindowBorderColor(w.get());
+        updateWindowAnimatedDecorationValues(w.get());
     }
 }
 
-void CCompositor::updateWindowBorderColor(CWindow* pWindow) {
+void CCompositor::updateWindowAnimatedDecorationValues(CWindow* pWindow) {
     // optimization
     static int64_t* ACTIVECOL = &g_pConfigManager->getConfigValuePtr("general:col.active_border")->intValue;
     static int64_t* INACTIVECOL = &g_pConfigManager->getConfigValuePtr("general:col.inactive_border")->intValue;
+    static auto *const PINACTIVEALPHA = &g_pConfigManager->getConfigValuePtr("decoration:inactive_opacity")->floatValue;
+    static auto *const PACTIVEALPHA = &g_pConfigManager->getConfigValuePtr("decoration:active_opacity")->floatValue;
+    static auto *const PFULLSCREENALPHA = &g_pConfigManager->getConfigValuePtr("decoration:fullscreen_opacity")->floatValue;
 
+
+    // border
     const auto RENDERDATA = g_pLayoutManager->getCurrentLayout()->requestRenderHints(pWindow);
     if (RENDERDATA.isBorderColor)
         pWindow->m_cRealBorderColor = RENDERDATA.borderColor;
     else
         pWindow->m_cRealBorderColor = CColor(pWindow == m_pLastWindow ? *ACTIVECOL : *INACTIVECOL);
+
+
+    // opacity
+    if (pWindow->m_bIsFullscreen) {
+        const auto PWORKSPACE = g_pCompositor->getWorkspaceByID(pWindow->m_iWorkspaceID);
+
+        if (PWORKSPACE->m_efFullscreenMode == FULLSCREEN_FULL)
+            pWindow->m_fActiveInactiveAlpha = *PFULLSCREENALPHA;
+        else {
+            if (pWindow == m_pLastWindow)
+                pWindow->m_fActiveInactiveAlpha = pWindow->m_sSpecialRenderData.alpha != -1 ? pWindow->m_sSpecialRenderData.alpha : *PACTIVEALPHA;
+            else
+                pWindow->m_fActiveInactiveAlpha = pWindow->m_sSpecialRenderData.alphaInactive != -1 ? pWindow->m_sSpecialRenderData.alphaInactive : *PINACTIVEALPHA;
+        }
+    } else {
+        if (pWindow == m_pLastWindow)
+            pWindow->m_fActiveInactiveAlpha = pWindow->m_sSpecialRenderData.alpha != -1 ? pWindow->m_sSpecialRenderData.alpha : *PACTIVEALPHA;
+        else
+            pWindow->m_fActiveInactiveAlpha = pWindow->m_sSpecialRenderData.alphaInactive != -1 ? pWindow->m_sSpecialRenderData.alphaInactive : *PINACTIVEALPHA;
+    }
 }
 
 void CCompositor::moveWindowToWorkspace(CWindow* pWindow, const std::string& work) {
diff --git a/src/Compositor.hpp b/src/Compositor.hpp
index caff38de..b386f542 100644
--- a/src/Compositor.hpp
+++ b/src/Compositor.hpp
@@ -133,8 +133,8 @@ public:
     bool                    isPointOnAnyMonitor(const Vector2D&);
     CWindow*                getConstraintWindow(SMouse*);
     SMonitor*               getMonitorInDirection(const char&);
-    void                    updateAllWindowsBorders();
-    void                    updateWindowBorderColor(CWindow*);
+    void                    updateAllWindowsAnimatedDecorationValues();
+    void                    updateWindowAnimatedDecorationValues(CWindow*);
     void                    moveWindowToWorkspace(CWindow*, const std::string&);
     int                     getNextAvailableMonitorID();
     void                    moveWorkspaceToMonitor(CWorkspace*, SMonitor*);
diff --git a/src/Window.cpp b/src/Window.cpp
index 6b264b6f..8c8cd147 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -7,6 +7,7 @@ CWindow::CWindow() {
     m_vRealSize.create(AVARTYPE_VECTOR, &g_pConfigManager->getConfigValuePtr("animations:windows_speed")->floatValue, &g_pConfigManager->getConfigValuePtr("animations:windows")->intValue, &g_pConfigManager->getConfigValuePtr("animations:windows_curve")->strValue, (void*)this, AVARDAMAGE_ENTIRE);
     m_cRealBorderColor.create(AVARTYPE_COLOR, &g_pConfigManager->getConfigValuePtr("animations:borders_speed")->floatValue, &g_pConfigManager->getConfigValuePtr("animations:borders")->intValue, &g_pConfigManager->getConfigValuePtr("animations:borders_curve")->strValue, (void*)this, AVARDAMAGE_BORDER);
     m_fAlpha.create(AVARTYPE_FLOAT, &g_pConfigManager->getConfigValuePtr("animations:fadein_speed")->floatValue, &g_pConfigManager->getConfigValuePtr("animations:fadein")->intValue, &g_pConfigManager->getConfigValuePtr("animations:fadein_curve")->strValue, (void*)this, AVARDAMAGE_ENTIRE);
+    m_fActiveInactiveAlpha.create(AVARTYPE_FLOAT, &g_pConfigManager->getConfigValuePtr("animations:fadein_speed")->floatValue, &g_pConfigManager->getConfigValuePtr("animations:fadein")->intValue, &g_pConfigManager->getConfigValuePtr("animations:fadein_curve")->strValue, (void*)this, AVARDAMAGE_ENTIRE);
 
     m_dWindowDecorations.emplace_back(std::make_unique<CHyprDropShadowDecoration>(this)); // put the shadow so it's the first deco (has to be rendered first)
 }
diff --git a/src/Window.hpp b/src/Window.hpp
index 2e236322..3bef02b1 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -106,6 +106,9 @@ public:
     SWindowSpecialRenderData m_sSpecialRenderData;
     SWindowAdditionalConfigData m_sAdditionalConfigData;
 
+    // for alpha
+    CAnimatedVariable m_fActiveInactiveAlpha;
+
     // For the list lookup
     bool operator==(const CWindow& rhs) {
         return m_uSurface.xdg == rhs.m_uSurface.xdg && m_uSurface.xwayland == rhs.m_uSurface.xwayland && m_vPosition == rhs.m_vPosition && m_vSize == rhs.m_vSize && m_bFadingOut == rhs.m_bFadingOut;
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 0243d2fe..ce4583f5 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -707,7 +707,7 @@ std::string CConfigManager::parseKeyword(const std::string& COMMAND, const std::
             g_pLayoutManager->getCurrentLayout()->recalculateMonitor(m->ID);
 
         // Update window border colors
-        g_pCompositor->updateAllWindowsBorders();
+        g_pCompositor->updateAllWindowsAnimatedDecorationValues();
 
         return retval;
     }
@@ -899,7 +899,7 @@ void CConfigManager::loadConfigLoadVars() {
     }
 
     // Update window border colors
-    g_pCompositor->updateAllWindowsBorders();
+    g_pCompositor->updateAllWindowsAnimatedDecorationValues();
 
     // Force the compositor to fully re-render all monitors
     for (auto& m : g_pCompositor->m_vMonitors)
diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index bbd7421a..71f1775f 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -32,6 +32,9 @@ void addViewCoords(void* pWindow, int* x, int* y) {
 void Events::listener_mapWindow(void* owner, void* data) {
     CWindow* PWINDOW = (CWindow*)owner;
 
+    static auto *const PINACTIVEALPHA = &g_pConfigManager->getConfigValuePtr("decoration:inactive_opacity")->floatValue;
+    static auto *const PACTIVEALPHA = &g_pConfigManager->getConfigValuePtr("decoration:active_opacity")->floatValue;
+
     const auto PMONITOR = g_pCompositor->getMonitorFromCursor();
     const auto PWORKSPACE = PMONITOR->specialWorkspaceOpen ? g_pCompositor->getWorkspaceByID(SPECIAL_WORKSPACE_ID) : g_pCompositor->getWorkspaceByID(PMONITOR->activeWorkspace);
     PWINDOW->m_iMonitorID = PMONITOR->ID;
@@ -235,8 +238,11 @@ void Events::listener_mapWindow(void* owner, void* data) {
         PWINDOW->m_vPseudoSize = PWINDOW->m_vRealSize.goalv() - Vector2D(10,10);
     }
 
-    if (!PWINDOW->m_bNoFocus && !PWINDOW->m_bNoInitialFocus && PWINDOW->m_iX11Type != 2)
+    if (!PWINDOW->m_bNoFocus && !PWINDOW->m_bNoInitialFocus && PWINDOW->m_iX11Type != 2) {
         g_pCompositor->focusWindow(PWINDOW);
+        PWINDOW->m_fActiveInactiveAlpha.setValueAndWarp(*PACTIVEALPHA);
+    } else
+        PWINDOW->m_fActiveInactiveAlpha.setValueAndWarp(*PINACTIVEALPHA);
 
     Debug::log(LOG, "Window got assigned a surfaceTreeNode %x", PWINDOW->m_pSurfaceTree);
 
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 3f43f343..e3a0f227 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -178,7 +178,7 @@ void CHyprRenderer::renderWindow(CWindow* pWindow, SMonitor* pMonitor, timespec*
     renderdata.h = std::clamp(pWindow->m_vRealSize.vec().y, (double)5, (double)1337420); // otherwise we'll have issues later with invalid boxes
     renderdata.dontRound = pWindow->m_bIsFullscreen && PWORKSPACE->m_efFullscreenMode == FULLSCREEN_FULL;
     renderdata.fadeAlpha = pWindow->m_fAlpha.fl() * (PWORKSPACE->m_fAlpha.fl() / 255.f);
-    renderdata.alpha = pWindow->m_bIsFullscreen ? g_pConfigManager->getFloat("decoration:fullscreen_opacity") : pWindow == g_pCompositor->m_pLastWindow ? g_pConfigManager->getFloat("decoration:active_opacity") : g_pConfigManager->getFloat("decoration:inactive_opacity");
+    renderdata.alpha = pWindow->m_fActiveInactiveAlpha.fl();
     renderdata.decorate = decorate && !pWindow->m_bX11DoesntWantBorders && (pWindow->m_bIsFloating ? *PNOFLOATINGBORDERS == 0 : true) && (!pWindow->m_bIsFullscreen || PWORKSPACE->m_efFullscreenMode != FULLSCREEN_FULL);
     renderdata.rounding = pWindow->m_sAdditionalConfigData.rounding;
     renderdata.blur = true; // if it shouldn't, it will be ignored later