diff --git a/src/simudator/gui/color_scheme.py b/src/simudator/gui/color_scheme.py
new file mode 100644
index 0000000000000000000000000000000000000000..ea428aee0355f603636bbcdcc6b55b0cd7dbb552
--- /dev/null
+++ b/src/simudator/gui/color_scheme.py
@@ -0,0 +1,18 @@
+from PyQt5.QtGui import QColor
+
+
+"""
+A class used for storing colors used by the gui in a central place that is easy
+to edit.
+"""
+class ColorScheme():
+    Window = QColor(125, 174, 163)
+    ModuleBackground = QColor(212, 190, 152)
+    ModuleOutline = QColor(0, 0, 0)
+    ModuleText = QColor(0, 0, 0)
+    ModuleShadow = QColor(60, 56, 54, 127)
+    Signal = QColor(255, 0, 0)
+    SignalHighlighted = QColor(255, 0, 0)
+    Port = QColor(0, 0, 0)
+    PortLabel = QColor(0, 0, 0)
+    PortHighlighted = QColor(0, 0, 0)
diff --git a/src/simudator/gui/cpu_graphics_scene.py b/src/simudator/gui/cpu_graphics_scene.py
index 925ad9846014c8538a422eacd43c298bf9f19933..489456086359b06812a9227a5eaffdcea7cc7732 100644
--- a/src/simudator/gui/cpu_graphics_scene.py
+++ b/src/simudator/gui/cpu_graphics_scene.py
@@ -1,6 +1,7 @@
 from PyQt5.QtWidgets import QGraphicsItem, QGraphicsScene
 
 from simudator.core.processor import Processor
+from simudator.gui.color_scheme import ColorScheme
 from simudator.gui.module_graphics_item.module_graphics_item import ModuleGraphicsItem
 from simudator.gui.signal_graphics_item import SignalGraphicsItem
 
@@ -19,6 +20,7 @@ class CpuGraphicsScene(QGraphicsScene):
         self.cpu = cpu
         self.module_graphics_items = dict()
         self.signal_graphics_items = []
+        self.setBackgroundBrush(ColorScheme.Window)
 
     def resetSignals(self) -> None:
         """
diff --git a/src/simudator/gui/module_graphics_item/mia/mia_memory_graphic.py b/src/simudator/gui/module_graphics_item/mia/mia_memory_graphic.py
index a5cf3fcfb5de54d0c95a99130decc8d6bdfa53d5..75a1141011062eba2c673c9fa4fb0ca10da82c53 100644
--- a/src/simudator/gui/module_graphics_item/mia/mia_memory_graphic.py
+++ b/src/simudator/gui/module_graphics_item/mia/mia_memory_graphic.py
@@ -10,6 +10,7 @@ from PyQt5.QtWidgets import (
 )
 
 from simudator.core.modules import Memory
+from simudator.gui.color_scheme import ColorScheme as CS
 from simudator.gui.module_graphics_item.module_graphics_item import ModuleGraphicsItem
 from simudator.gui.orientation import Orientation
 from simudator.gui.port_graphics_item import PortGraphicsItem
@@ -64,6 +65,8 @@ class MemoryGraphicsItem(ModuleGraphicsItem):
 
         # Create base backgrond rect
         self.baserect = QGraphicsRectItem(0, 0, self.RECT_WIDTH, self.RECT_HEIGHT, self)
+        self.baserect.setPen(CS.ModuleOutline)
+        self.baserect.setBrush(CS.ModuleBackground)
 
         # Make ports
         self.input = PortGraphicsItem(self.module.get_input_signal(),
diff --git a/src/simudator/gui/module_graphics_item/module_graphics_item.py b/src/simudator/gui/module_graphics_item/module_graphics_item.py
index 2884b68070e1f186f6a3c7b481d822799bd2d0c2..aa7e750d03552b946c13975be01483a5716a8881 100644
--- a/src/simudator/gui/module_graphics_item/module_graphics_item.py
+++ b/src/simudator/gui/module_graphics_item/module_graphics_item.py
@@ -14,6 +14,7 @@ from PyQt5.QtWidgets import (
 )
 
 from simudator.core.module import Module
+from simudator.gui.color_scheme import ColorScheme as CS
 from simudator.gui.gui import pyqtSignal
 from simudator.gui.orientation import Orientation
 from simudator.gui.port_graphics_item import PortGraphicsItem
@@ -98,8 +99,15 @@ class ModuleGraphicsItem(QGraphicsObject, QGraphicsItem):
                      members_height)
         width  = longest_line_len * self.CHAR_LEN * 2 + 2 * self.WIDTH_MARGIN
 
+        # Shadow
+        self.shadow = QGraphicsRectItem(0, 0, width, height, self)
+        self.shadow.setBrush(CS.ModuleShadow)
+        self.shadow.setPen(CS.ModuleShadow)
+        self.shadow.setPos(self.pos() + QtCore.QPointF(5, 10))
+
         # Create base background rectangle
         self.baserect = QGraphicsRectItem(0, 0, width, height, self)
+        self.baserect.setBrush(CS.ModuleBackground)
 
         # Add ports for input signals
         self.draw_ports()
@@ -107,6 +115,7 @@ class ModuleGraphicsItem(QGraphicsObject, QGraphicsItem):
         # Create name lable
         name_text = QGraphicsSimpleTextItem(self.state["name"], self)
         name_text.setPos(width/2-len(self.state["name"])*self.CHAR_LEN, 0)
+        name_text.setBrush(CS.ModuleText)
 
         # Create state lables
         self.state_lables = {}
@@ -117,6 +126,7 @@ class ModuleGraphicsItem(QGraphicsObject, QGraphicsItem):
                 state_text = QGraphicsSimpleTextItem(text, self)
                 state_text.setPos(width/20,
                         state_tuple[0]*self.CHAR_HEIGHT)
+                state_text.setBrush(CS.ModuleText)
                 self.state_lables[state_tuple[1]] = state_text
 
     def draw_ports(self) -> None:
@@ -275,8 +285,5 @@ class ModuleGraphicsItem(QGraphicsObject, QGraphicsItem):
     def get_scene_pos(self):
         return self.scenePos()
 
-    def get_ports(self) -> None:
-        return self.listeners
-
     def getName(self) -> str:
         return self.name
diff --git a/src/simudator/gui/port_graphics_item.py b/src/simudator/gui/port_graphics_item.py
index 43856d2ab12c32587fb7d16934aeb29f3bdbe786..2dfd45c0930b1b4a513dc3596008c227427b11b2 100644
--- a/src/simudator/gui/port_graphics_item.py
+++ b/src/simudator/gui/port_graphics_item.py
@@ -12,6 +12,7 @@ from PyQt5.QtWidgets import (
 )
 
 from simudator.core.signal import Signal
+from simudator.gui.color_scheme import ColorScheme
 from simudator.gui.orientation import Orientation
 
 
@@ -93,6 +94,11 @@ class PortGraphicsItem(QGraphicsItemGroup):
         font.setPointSize(self.FONT_SIZE)
         self.name_label.setFont(font)
 
+        # Set colors
+        self.vertical_line.setPen(ColorScheme.Port)
+        self.horizontal_line.setPen(ColorScheme.Port)
+        self.name_label.setBrush(ColorScheme.PortLabel)
+
         self.addToGroup(self.vertical_line)
         self.addToGroup(self.horizontal_line)
         self.addToGroup(self.name_label)
diff --git a/src/simudator/gui/signal_graphics_item.py b/src/simudator/gui/signal_graphics_item.py
index 22bde5b312f33cd2acf6f47d0ffeec06604b3824..e9ddc3922662ad66ecb42193ebc5ae8c24c1df4f 100644
--- a/src/simudator/gui/signal_graphics_item.py
+++ b/src/simudator/gui/signal_graphics_item.py
@@ -6,6 +6,7 @@ from PyQt5.QtCore import QPointF, Qt
 from PyQt5.QtGui import QCursor
 from PyQt5.QtWidgets import QGraphicsItem, QGraphicsLineItem, QGraphicsSceneMouseEvent
 
+from simudator.gui.color_scheme import ColorScheme
 from simudator.gui.port_graphics_item import PortGraphicsItem
 
 SHORTEST_LINE_LEN = 400
@@ -117,6 +118,7 @@ class SignalGraphicsItem(QGraphicsItem):
             x2 = point.x()
             y2 = point.y()
             line = QGraphicsLineItem(x1, y1, x2, y2, self)
+            line.setPen(ColorScheme.Signal)
             self.lines.append(line)
             prev_point = point