diff --git a/FlexLove.lua b/FlexLove.lua
index 381e271..e1977ad 100644
--- a/FlexLove.lua
+++ b/FlexLove.lua
@@ -677,7 +677,7 @@ local Gui = {
 }
 
 --- Initialize FlexLove with configuration
----@param config {baseScale?: {width?:number, height?:number}} --Default: {width: 1920, height: 1080}
+---@param config {baseScale?: {width?:number, height?:number}, theme?: string|ThemeDefinition} --Default: {width: 1920, height: 1080}
 function Gui.init(config)
   if config.baseScale then
     Gui.baseScale = {
@@ -690,6 +690,19 @@ function Gui.init(config)
     Gui.scaleFactors.x = currentWidth / Gui.baseScale.width
     Gui.scaleFactors.y = currentHeight / Gui.baseScale.height
   end
+
+  -- Load and set theme if specified
+  if config.theme then
+    if type(config.theme) == "string" then
+      -- Load theme by name
+      Theme.load(config.theme)
+      Theme.setActive(config.theme)
+    elseif type(config.theme) == "table" then
+      -- Load theme from definition
+      local theme = Theme.new(config.theme)
+      Theme.setActive(theme)
+    end
+  end
 end
 
 --- Get current scale factors
@@ -1084,7 +1097,7 @@ function Element.new(props)
   -- Initialize theme
   self.theme = props.theme
   self._themeState = "normal"
-  
+
   -- Initialize state properties
   self.disabled = props.disabled or false
   self.active = props.active or false
diff --git a/examples/ThemeInitDemo.lua b/examples/ThemeInitDemo.lua
new file mode 100644
index 0000000..c361892
--- /dev/null
+++ b/examples/ThemeInitDemo.lua
@@ -0,0 +1,97 @@
+-- Example: Setting theme in Gui.init()
+local FlexLove = require("FlexLove")
+local Gui = FlexLove.GUI
+local Color = FlexLove.Color
+
+-- Initialize GUI with theme
+Gui.init({
+  baseScale = { width = 1920, height = 1080 },
+  theme = "space"  -- Load and activate the space theme
+})
+
+-- Now all elements can use the theme
+local panel = Gui.new({
+  x = 100,
+  y = 100,
+  width = 400,
+  height = 300,
+  theme = "panel",
+  padding = { top = 20, right = 20, bottom = 20, left = 20 },
+})
+
+local button1 = Gui.new({
+  parent = panel,
+  x = 20,
+  y = 20,
+  width = 150,
+  height = 50,
+  text = "Normal Button",
+  textAlign = "center",
+  textColor = Color.new(1, 1, 1, 1),
+  theme = "button",
+  callback = function(element, event)
+    if event.type == "click" then
+      print("Button clicked!")
+    end
+  end
+})
+
+local button2 = Gui.new({
+  parent = panel,
+  x = 20,
+  y = 80,
+  width = 150,
+  height = 50,
+  text = "Disabled",
+  textAlign = "center",
+  textColor = Color.new(0.6, 0.6, 0.6, 1),
+  theme = "button",
+  disabled = true,  -- Shows disabled state
+  callback = function(element, event)
+    print("This won't fire!")
+  end
+})
+
+local input1 = Gui.new({
+  parent = panel,
+  x = 20,
+  y = 140,
+  width = 200,
+  height = 40,
+  text = "Type here...",
+  textColor = Color.new(1, 1, 1, 1),
+  theme = "input",
+})
+
+local input2 = Gui.new({
+  parent = panel,
+  x = 20,
+  y = 190,
+  width = 200,
+  height = 40,
+  text = "Active input",
+  textColor = Color.new(1, 1, 1, 1),
+  theme = "input",
+  active = true,  -- Shows active/focused state
+})
+
+local input3 = Gui.new({
+  parent = panel,
+  x = 20,
+  y = 240,
+  width = 200,
+  height = 40,
+  text = "Disabled input",
+  textColor = Color.new(0.6, 0.6, 0.6, 1),
+  theme = "input",
+  disabled = true,  -- Shows disabled state
+})
+
+return {
+  panel = panel,
+  button1 = button1,
+  button2 = button2,
+  input1 = input1,
+  input2 = input2,
+  input3 = input3,
+}
diff --git a/themes/space.lua b/themes/space.lua
index 3745683..e629597 100644
--- a/themes/space.lua
+++ b/themes/space.lua
@@ -1,45 +1,176 @@
+-- Space Theme
+-- All images are 256x256 with perfectly centered 9-slice regions
+
+local Color = require("FlexLove").Color
+
 return {
   name = "Space Theme",
+
   components = {
+    -- Panel component
     panel = {
       atlas = "themes/space/panel-compressed.png",
-      regions = {},
+      regions = {
+        -- Equal-sized regions for 256x256 image (85-86-85 split)
+        -- Top row
+        topLeft = { x = 0, y = 0, w = 85, h = 85 },
+        topCenter = { x = 85, y = 0, w = 86, h = 85 },
+        topRight = { x = 171, y = 0, w = 85, h = 85 },
+        -- Middle row (stretchable)
+        middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+        middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+        middleRight = { x = 171, y = 85, w = 85, h = 86 },
+        -- Bottom row
+        bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+        bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+        bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+      },
+      stretch = {
+        horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+        vertical = { "middleLeft", "middleCenter", "middleRight" },
+      },
     },
+
+    -- Button component with states
     button = {
       atlas = "themes/space/interactive-compressed.png",
-      regions = {},
+      regions = {
+        topLeft = { x = 0, y = 0, w = 85, h = 85 },
+        topCenter = { x = 85, y = 0, w = 86, h = 85 },
+        topRight = { x = 171, y = 0, w = 85, h = 85 },
+        middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+        middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+        middleRight = { x = 171, y = 85, w = 85, h = 86 },
+        bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+        bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+        bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+      },
+      stretch = {
+        horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+        vertical = { "middleLeft", "middleCenter", "middleRight" },
+      },
       states = {
         hover = {
-          atlas = "themes/interactive_hover-compressed.png",
-          regions = { ... },
+          atlas = "themes/space/interactive-hovered-compressed.png",
+          regions = {
+            topLeft = { x = 0, y = 0, w = 85, h = 85 },
+            topCenter = { x = 85, y = 0, w = 86, h = 85 },
+            topRight = { x = 171, y = 0, w = 85, h = 85 },
+            middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+            middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+            middleRight = { x = 171, y = 85, w = 85, h = 86 },
+            bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+            bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+            bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+          },
+          stretch = {
+            horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+            vertical = { "middleLeft", "middleCenter", "middleRight" },
+          },
         },
         pressed = {
-          atlas = "themes/interactive_pressed-compressed.png",
-          regions = { ... },
+          atlas = "themes/space/interactive-pressed-compressed.png",
+          regions = {
+            topLeft = { x = 0, y = 0, w = 85, h = 85 },
+            topCenter = { x = 85, y = 0, w = 86, h = 85 },
+            topRight = { x = 171, y = 0, w = 85, h = 85 },
+            middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+            middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+            middleRight = { x = 171, y = 85, w = 85, h = 86 },
+            bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+            bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+            bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+          },
+          stretch = {
+            horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+            vertical = { "middleLeft", "middleCenter", "middleRight" },
+          },
         },
         disabled = {
-          atlas = "themes/interactive_disabled-compressed.png",
-          regions = { ... },
+          atlas = "themes/space/interactive-disabled-compressed.png",
+          regions = {
+            topLeft = { x = 0, y = 0, w = 85, h = 85 },
+            topCenter = { x = 85, y = 0, w = 86, h = 85 },
+            topRight = { x = 171, y = 0, w = 85, h = 85 },
+            middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+            middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+            middleRight = { x = 171, y = 85, w = 85, h = 86 },
+            bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+            bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+            bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+          },
+          stretch = {
+            horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+            vertical = { "middleLeft", "middleCenter", "middleRight" },
+          },
         },
       },
     },
+
+    -- Input component with active and disabled states
     input = {
       atlas = "themes/space/interactive-compressed.png",
-      regions = {},
+      regions = {
+        topLeft = { x = 0, y = 0, w = 85, h = 85 },
+        topCenter = { x = 85, y = 0, w = 86, h = 85 },
+        topRight = { x = 171, y = 0, w = 85, h = 85 },
+        middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+        middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+        middleRight = { x = 171, y = 85, w = 85, h = 86 },
+        bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+        bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+        bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+      },
+      stretch = {
+        horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+        vertical = { "middleLeft", "middleCenter", "middleRight" },
+      },
       states = {
-        hover = {
-          atlas = "themes/interactive_hover-compressed.png",
-          regions = { ... },
-        },
-        pressed = {
-          atlas = "themes/interactive_pressed-compressed.png",
-          regions = { ... },
+        active = {
+          atlas = "themes/space/interactive-hovered-compressed.png",
+          regions = {
+            topLeft = { x = 0, y = 0, w = 85, h = 85 },
+            topCenter = { x = 85, y = 0, w = 86, h = 85 },
+            topRight = { x = 171, y = 0, w = 85, h = 85 },
+            middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+            middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+            middleRight = { x = 171, y = 85, w = 85, h = 86 },
+            bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+            bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+            bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+          },
+          stretch = {
+            horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+            vertical = { "middleLeft", "middleCenter", "middleRight" },
+          },
         },
         disabled = {
-          atlas = "themes/interactive_disabled-compressed.png",
-          regions = { ... },
+          atlas = "themes/space/interactive-disabled-compressed.png",
+          regions = {
+            topLeft = { x = 0, y = 0, w = 85, h = 85 },
+            topCenter = { x = 85, y = 0, w = 86, h = 85 },
+            topRight = { x = 171, y = 0, w = 85, h = 85 },
+            middleLeft = { x = 0, y = 85, w = 85, h = 86 },
+            middleCenter = { x = 85, y = 85, w = 86, h = 86 },
+            middleRight = { x = 171, y = 85, w = 85, h = 86 },
+            bottomLeft = { x = 0, y = 171, w = 85, h = 85 },
+            bottomCenter = { x = 85, y = 171, w = 86, h = 85 },
+            bottomRight = { x = 171, y = 171, w = 85, h = 85 },
+          },
+          stretch = {
+            horizontal = { "topCenter", "middleCenter", "bottomCenter" },
+            vertical = { "middleLeft", "middleCenter", "middleRight" },
+          },
         },
       },
     },
   },
+
+  -- Optional: Theme colors
+  colors = {
+    primary = Color.new(0.08, 0.75, 0.95), -- bright cyan-blue glow for accents and highlights
+    secondary = Color.new(0.15, 0.20, 0.25), -- deep steel-gray background for panels
+    text = Color.new(0.80, 0.90, 1.00), -- soft cool-white for general text
+    textDark = Color.new(0.35, 0.40, 0.45), -- dimmed gray-blue for secondary text
+  },
 }