diff --git a/lib/libimhex/source/api/theme_manager.cpp b/lib/libimhex/source/api/theme_manager.cpp
index d7588459c..1410666e9 100644
--- a/lib/libimhex/source/api/theme_manager.cpp
+++ b/lib/libimhex/source/api/theme_manager.cpp
@@ -31,6 +31,9 @@ namespace hex::api {
     }
 
     std::optional<ImColor> ThemeManager::parseColorString(const std::string &colorString) {
+        if (colorString == "auto")
+            return ImVec4(0, 0, 0, -1);
+
         if (colorString.length() != 9 || colorString[0] != '#')
             return std::nullopt;
 
@@ -48,6 +51,9 @@ namespace hex::api {
                 return std::nullopt;
         }
 
+        if (color == 0x00000000)
+            return ImVec4(0, 0, 0, -1);
+
         return ImColor(hex::changeEndianess(color, std::endian::big));
     }
 
diff --git a/plugins/builtin/romfs/themes/classic.json b/plugins/builtin/romfs/themes/classic.json
index 2e0ec2b65..3ba2a913f 100644
--- a/plugins/builtin/romfs/themes/classic.json
+++ b/plugins/builtin/romfs/themes/classic.json
@@ -103,23 +103,23 @@
             "title-bar-selected": "#5252A1FF"
         },
         "implot": {
-            "axis-bg": "#00000000",
-            "axis-bg-active": "#00000000",
-            "axis-bg-hovered": "#00000000",
+            "axis-bg": "auto",
+            "axis-bg-active": "auto",
+            "axis-bg-hovered": "auto",
             "axis-grid": "#E5E5E53F",
             "axis-text": "#E5E5E5FF",
-            "axis-tick": "#0000003F",
+            "axis-tick": "auto",
             "crosshairs": "#7F7F7FBF",
-            "error-bar": "#E5E5E5FF",
-            "fill": "#00000000",
+            "error-bar": "auto",
+            "fill": "auto",
             "frame-bg": "#6D6D6D63",
             "inlay-text": "#E5E5E5FF",
             "legend-bg": "#1C1C23EA",
             "legend-border": "#7F7F7F7F",
             "legend-text": "#E5E5E5FF",
-            "line": "#00000000",
-            "marker-fill": "#00000000",
-            "marker-outline": "#00000000",
+            "line": "auto",
+            "marker-fill": "auto",
+            "marker-outline": "auto",
             "plot-bg": "#00000059",
             "plot-border": "#7F7F7F7F",
             "selection": "#F7F763FF",
diff --git a/plugins/builtin/romfs/themes/dark.json b/plugins/builtin/romfs/themes/dark.json
index 3ec414b13..ea614ed6c 100644
--- a/plugins/builtin/romfs/themes/dark.json
+++ b/plugins/builtin/romfs/themes/dark.json
@@ -103,23 +103,23 @@
             "title-bar-selected": "#4296FAFF"
         },
         "implot": {
-            "axis-bg": "#00000000",
-            "axis-bg-active": "#00000000",
-            "axis-bg-hovered": "#00000000",
+            "axis-bg": "auto",
+            "axis-bg-active": "auto",
+            "axis-bg-hovered": "auto",
             "axis-grid": "#FFFFFF3F",
             "axis-text": "#FFFFFFFF",
-            "axis-tick": "#00000000",
+            "axis-tick": "auto",
             "crosshairs": "#FFFFFF7F",
-            "error-bar": "#00000000",
-            "fill": "#00000000",
+            "error-bar": "auto",
+            "fill": "auto",
             "frame-bg": "#FFFFFF11",
             "inlay-text": "#FFFFFFFF",
             "legend-bg": "#141414EF",
             "legend-border": "#6D6D7F7F",
             "legend-text": "#FFFFFFFF",
-            "line": "#00000000",
-            "marker-fill": "#00000000",
-            "marker-outline": "#00000000",
+            "line": "auto",
+            "marker-fill": "auto",
+            "marker-outline": "auto",
             "plot-bg": "#0000007F",
             "plot-border": "#6D6D7F7F",
             "selection": "#FF9900FF",
diff --git a/plugins/builtin/romfs/themes/light.json b/plugins/builtin/romfs/themes/light.json
index cd03802a1..0a58fb7f0 100644
--- a/plugins/builtin/romfs/themes/light.json
+++ b/plugins/builtin/romfs/themes/light.json
@@ -103,23 +103,23 @@
             "title-bar-selected": "#D1D1D1FF"
         },
         "implot": {
-            "axis-bg": "#00000000",
-            "axis-bg-active": "#00000000",
-            "axis-bg-hovered": "#00000000",
+            "axis-bg": "auto",
+            "axis-bg-active": "auto",
+            "axis-bg-hovered": "auto",
             "axis-grid": "#FFFFFFFF",
-            "axis-text": "#000000FF",
+            "axis-text": "auto",
             "axis-tick": "#0000003F",
             "crosshairs": "#0000007F",
-            "error-bar": "#00000000",
-            "fill": "#00000000",
+            "error-bar": "auto",
+            "fill": "auto",
             "frame-bg": "#FFFFFFFF",
             "inlay-text": "#000000FF",
             "legend-bg": "#FFFFFFF9",
             "legend-border": "#D1D1D1CC",
             "legend-text": "#000000FF",
-            "line": "#00000000",
-            "marker-fill": "#00000000",
-            "marker-outline": "#00000000",
+            "line": "auto",
+            "marker-fill": "auto",
+            "marker-outline": "auto",
             "plot-bg": "#6B91FF21",
             "plot-border": "#00000000",
             "selection": "#D1A307FF",