diff --git a/web/src/FilesTabsPanel.js b/web/src/FilesTabsPanel.js
index 2ca2f8917..bfc281f15 100644
--- a/web/src/FilesTabsPanel.js
+++ b/web/src/FilesTabsPanel.js
@@ -1,5 +1,6 @@
 import React from "react";
 import styled from "styled-components";
+import theme from "./theme";
 
 const files = [
   { name: "app.js" },
@@ -15,9 +16,10 @@ const FileTabItem = styled.div`
   align-items: center;
   cursor: pointer;
   &:hover {
-    color: #338;
+    color: ${theme.tabsPanel.hoverFont};
   }
-  background-color: ${props => (props.selected ? "#eee" : "inherit")};
+  background-color: ${props =>
+    props.selected ? theme.mainArea.background : "inherit"};
 `;
 
 export default function FilesTabsPanel() {
diff --git a/web/src/Screen.js b/web/src/Screen.js
index 2b654e5a3..13c7872d4 100644
--- a/web/src/Screen.js
+++ b/web/src/Screen.js
@@ -6,10 +6,10 @@ import FilesTabsPanel from "./FilesTabsPanel";
 const BodyDiv = styled.div`
   position: fixed;
   top: ${theme.tabsPanel.height}px;
-  left: ${theme.widgetMenu.iconSize + theme.widgetMenu.panelWidth}px;
+  left: ${theme.widgetMenu.iconSize + theme.leftPanel.width}px;
   bottom: ${theme.statusBar.height}px;
   right: 0;
-  background-color: #eee;
+  background-color: ${theme.mainArea.background};
 `;
 
 const IconBar = styled.div`
@@ -18,26 +18,26 @@ const IconBar = styled.div`
   left: 0;
   bottom: ${theme.statusBar.height}px;
   width: ${theme.widgetMenu.iconSize}px;
-  background-color: #222;
+  background-color: ${theme.widgetMenu.background};
 `;
 
-const LeftMenu = styled.div`
+const LeftPanel = styled.div`
   position: fixed;
   top: 0;
   left: ${theme.widgetMenu.iconSize}px;
   bottom: ${theme.statusBar.height}px;
-  width: ${theme.widgetMenu.panelWidth}px;
-  background-color: #ccc;
+  width: ${theme.leftPanel.width}px;
+  background-color: ${theme.leftPanel.background};
 `;
 
 const TabsPanel = styled.div`
   display: flex;
   position: fixed;
   top: 0;
-  left: ${theme.widgetMenu.iconSize + theme.widgetMenu.panelWidth}px;
+  left: ${theme.widgetMenu.iconSize + theme.leftPanel.width}px;
   height: ${theme.tabsPanel.height}px;
   right: 0;
-  background-color: #ddd;
+  background-color: ${theme.tabsPanel.background};
 `;
 
 const StausBar = styled.div`
@@ -46,15 +46,17 @@ const StausBar = styled.div`
   left: 0;
   right: 0;
   bottom: 0;
-  background-color: #00c;
+  background-color: ${theme.statusBar.background};
 `;
 
 export default function Screen({ children }) {
   return (
     <>
       <IconBar></IconBar>
-      <LeftMenu></LeftMenu>
-      <TabsPanel><FilesTabsPanel></FilesTabsPanel></TabsPanel>
+      <LeftPanel></LeftPanel>
+      <TabsPanel>
+        <FilesTabsPanel></FilesTabsPanel>
+      </TabsPanel>
       <BodyDiv>{children}</BodyDiv>
       <StausBar></StausBar>
     </>
diff --git a/web/src/theme.js b/web/src/theme.js
index 416621afc..a9e31f07d 100644
--- a/web/src/theme.js
+++ b/web/src/theme.js
@@ -1,12 +1,22 @@
 export default {
   widgetMenu: {
     iconSize: 80,
-    panelWidth: 300
+    background: "#222"
+  },
+  leftPanel: {
+    width: 300,
+    background: "#ccc"
   },
   tabsPanel: {
-    height: 30
+    height: 30,
+    background:'#ddd',
+    hoverFont: '#338'
   },
   statusBar: {
-    height: 20
+    height: 20,
+    background: "#00c"
+  },
+  mainArea: {
+    background: "#eee"
   }
 };