diff --git a/app/components/DocumentHistory/components/Revision.js b/app/components/DocumentHistory/components/Revision.js
index c8d0774c..dbb228a4 100644
--- a/app/components/DocumentHistory/components/Revision.js
+++ b/app/components/DocumentHistory/components/Revision.js
@@ -11,11 +11,12 @@ import Avatar from "components/Avatar";
 import Flex from "components/Flex";
 import Time from "components/Time";
 import RevisionMenu from "menus/RevisionMenu";
+import { type Theme } from "types";
 
 import { documentHistoryUrl } from "utils/routeHelpers";
 
 type Props = {
-  theme: Object,
+  theme: Theme,
   showMenu: boolean,
   selected: boolean,
   document: Document,
diff --git a/app/components/InputSearch.js b/app/components/InputSearch.js
index 7d594580..1ab086e1 100644
--- a/app/components/InputSearch.js
+++ b/app/components/InputSearch.js
@@ -7,11 +7,12 @@ import keydown from "react-keydown";
 import { withRouter, type RouterHistory } from "react-router-dom";
 import styled, { withTheme } from "styled-components";
 import Input from "./Input";
+import { type Theme } from "types";
 import { searchUrl } from "utils/routeHelpers";
 
 type Props = {
   history: RouterHistory,
-  theme: Object,
+  theme: Theme,
   source: string,
   placeholder?: string,
   collectionId?: string,
diff --git a/app/components/Layout.js b/app/components/Layout.js
index fcd68518..8f58d5a1 100644
--- a/app/components/Layout.js
+++ b/app/components/Layout.js
@@ -21,6 +21,7 @@ import { LoadingIndicatorBar } from "components/LoadingIndicator";
 import Modal from "components/Modal";
 import Sidebar from "components/Sidebar";
 import SettingsSidebar from "components/Sidebar/Settings";
+import { type Theme } from "types";
 import {
   homeUrl,
   searchUrl,
@@ -35,7 +36,7 @@ type Props = {
   auth: AuthStore,
   ui: UiStore,
   notifications?: React.Node,
-  theme: Object,
+  theme: Theme,
 };
 
 @observer
diff --git a/app/components/Sidebar/components/SidebarLink.js b/app/components/Sidebar/components/SidebarLink.js
index db4f2f69..b56ac8c5 100644
--- a/app/components/Sidebar/components/SidebarLink.js
+++ b/app/components/Sidebar/components/SidebarLink.js
@@ -5,6 +5,7 @@ import * as React from "react";
 import { withRouter, NavLink } from "react-router-dom";
 import styled, { withTheme } from "styled-components";
 import Flex from "components/Flex";
+import { type Theme } from "types";
 
 type Props = {
   to?: string | Object,
@@ -19,7 +20,7 @@ type Props = {
   hideDisclosure?: boolean,
   iconColor?: string,
   active?: boolean,
-  theme: Object,
+  theme: Theme,
   exact?: boolean,
   depth?: number,
 };
diff --git a/app/components/Tab.js b/app/components/Tab.js
index 4c165b76..75b9e61d 100644
--- a/app/components/Tab.js
+++ b/app/components/Tab.js
@@ -2,9 +2,10 @@
 import * as React from "react";
 import { NavLink } from "react-router-dom";
 import styled, { withTheme } from "styled-components";
+import { type Theme } from "types";
 
 type Props = {
-  theme: Object,
+  theme: Theme,
 };
 
 const StyledNavLink = styled(NavLink)`
diff --git a/app/scenes/Collection.js b/app/scenes/Collection.js
index 40729510..fa8e7632 100644
--- a/app/scenes/Collection.js
+++ b/app/scenes/Collection.js
@@ -36,6 +36,7 @@ import Tab from "components/Tab";
 import Tabs from "components/Tabs";
 import Tooltip from "components/Tooltip";
 import CollectionMenu from "menus/CollectionMenu";
+import { type Theme } from "types";
 import { AuthorizationError } from "utils/errors";
 import { newDocumentUrl, collectionUrl } from "utils/routeHelpers";
 
@@ -45,7 +46,7 @@ type Props = {
   collections: CollectionsStore,
   policies: PoliciesStore,
   match: Match,
-  theme: Object,
+  theme: Theme,
 };
 
 @observer
diff --git a/app/scenes/Document/components/DataLoader.js b/app/scenes/Document/components/DataLoader.js
index 4865db4f..46cdcdca 100644
--- a/app/scenes/Document/components/DataLoader.js
+++ b/app/scenes/Document/components/DataLoader.js
@@ -22,7 +22,7 @@ import DocumentComponent from "./Document";
 import HideSidebar from "./HideSidebar";
 import Loading from "./Loading";
 import SocketPresence from "./SocketPresence";
-import { type LocationWithState } from "types";
+import { type LocationWithState, type Theme } from "types";
 import { NotFoundError, OfflineError } from "utils/errors";
 import isInternalUrl from "utils/isInternalUrl";
 import { matchDocumentEdit, updateDocumentUrl } from "utils/routeHelpers";
@@ -35,7 +35,7 @@ type Props = {|
   policies: PoliciesStore,
   revisions: RevisionsStore,
   ui: UiStore,
-  theme: Object,
+  theme: Theme,
   history: RouterHistory,
 |};
 
diff --git a/app/scenes/Document/components/Document.js b/app/scenes/Document/components/Document.js
index d7407240..abccfb43 100644
--- a/app/scenes/Document/components/Document.js
+++ b/app/scenes/Document/components/Document.js
@@ -30,7 +30,7 @@ import Header from "./Header";
 import KeyboardShortcutsButton from "./KeyboardShortcutsButton";
 import MarkAsViewed from "./MarkAsViewed";
 import References from "./References";
-import { type LocationWithState } from "types";
+import { type LocationWithState, type Theme } from "types";
 import { isCustomDomain } from "utils/domains";
 import { emojiToUrl } from "utils/emoji";
 import {
@@ -62,7 +62,7 @@ type Props = {
   readOnly: boolean,
   onCreateLink: (title: string) => string,
   onSearchLink: (term: string) => any,
-  theme: Object,
+  theme: Theme,
   auth: AuthStore,
   ui: UiStore,
 };
diff --git a/app/scenes/Search/components/SearchField.js b/app/scenes/Search/components/SearchField.js
index 5d8e897f..440627c3 100644
--- a/app/scenes/Search/components/SearchField.js
+++ b/app/scenes/Search/components/SearchField.js
@@ -3,11 +3,12 @@ import { SearchIcon } from "outline-icons";
 import * as React from "react";
 import styled, { withTheme } from "styled-components";
 import Flex from "components/Flex";
+import { type Theme } from "types";
 
 type Props = {
   onChange: (string) => void,
   defaultValue?: string,
-  theme: Object,
+  theme: Theme,
 };
 
 class SearchField extends React.Component<Props> {
diff --git a/app/types/index.js b/app/types/index.js
index 8d8b0444..a30d9260 100644
--- a/app/types/index.js
+++ b/app/types/index.js
@@ -1,7 +1,10 @@
 // @flow
 import { type Location } from "react-router-dom";
+import theme from "shared/styles/theme";
 import Document from "models/Document";
 
+export type Theme = typeof theme;
+
 export type LocationWithState = Location & {
   state: {
     [key: string]: string,