diff --git a/CHANGELOG-2.x.md b/CHANGELOG-2.x.md
index 985b7f18cf..19861df871 100644
--- a/CHANGELOG-2.x.md
+++ b/CHANGELOG-2.x.md
@@ -1,5 +1,15 @@
 # Docusaurus 2 Changelog
 
+## 2.0.0-alpha.51
+
+#### :boom: Breaking Change
+
+- `infima`
+  - The following infima variables have been renamed for consistency:
+    - `--ifm-font-base-color` → `--ifm-font-color-base`
+    - `--ifm-font-base-color-inverse` → `--ifm-font-color-base-inverse`
+    - `--ifm-font-color-secondary` → `--ifm-font-color-secondary`
+
 ## 2.0.0-alpha.50 (2020-04-02)
 
 **HOTFIX for 2.0.0-alpha.49**.
diff --git a/packages/docusaurus-theme-classic/package.json b/packages/docusaurus-theme-classic/package.json
index b06c637d06..ec5578f9d3 100644
--- a/packages/docusaurus-theme-classic/package.json
+++ b/packages/docusaurus-theme-classic/package.json
@@ -12,7 +12,7 @@
     "@mdx-js/react": "^1.5.8",
     "classnames": "^2.2.6",
     "clipboard": "^2.0.6",
-    "infima": "0.2.0-alpha.6",
+    "infima": "0.2.0-alpha.9",
     "parse-numeric-range": "^0.0.2",
     "prism-react-renderer": "^1.1.0",
     "prismjs": "^1.20.0",
diff --git a/packages/docusaurus-theme-classic/src/theme/Navbar/index.js b/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
index 5db5e854c6..7b06aefc6e 100644
--- a/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
+++ b/packages/docusaurus-theme-classic/src/theme/Navbar/index.js
@@ -20,7 +20,15 @@ import useLogo from '@theme/hooks/useLogo';
 
 import styles from './styles.module.css';
 
-function NavLink({activeBasePath, to, href, label, position, ...props}) {
+function NavLink({
+  activeBasePath,
+  to,
+  href,
+  label,
+  position,
+  activeClassName = 'navbar__link--active',
+  ...props
+}) {
   const toUrl = useBaseUrl(to);
   const activeBaseUrl = useBaseUrl(activeBasePath);
 
@@ -34,7 +42,7 @@ function NavLink({activeBasePath, to, href, label, position, ...props}) {
           }
         : {
             isNavLink: true,
-            activeClassName: 'navbar__link--active',
+            activeClassName,
             to: toUrl,
             ...(activeBasePath
               ? {
@@ -50,8 +58,11 @@ function NavLink({activeBasePath, to, href, label, position, ...props}) {
 }
 
 function NavItem({items, position, className, ...props}) {
-  const navLinkClassNames = (extraClassName) =>
-    classnames('navbar__item', 'navbar__link', extraClassName);
+  const navLinkClassNames = (extraClassName, isDropdownItem) =>
+    classnames(extraClassName, {
+      'navbar__item navbar__link': !isDropdownItem,
+      dropdown__link: isDropdownItem,
+    });
 
   if (!items) {
     return <NavLink className={navLinkClassNames(className)} {...props} />;
@@ -71,7 +82,8 @@ function NavItem({items, position, className, ...props}) {
           ({className: childItemClassName, ...linkItemInnerProps}, i) => (
             <li key={i}>
               <NavLink
-                className={navLinkClassNames(childItemClassName)}
+                activeClassName="dropdown__link--active"
+                className={navLinkClassNames(childItemClassName, true)}
                 {...linkItemInnerProps}
               />
             </li>
@@ -106,6 +118,7 @@ function MobileNavItem({items, className, ...props}) {
           ({className: childItemClassName, ...linkItemInnerProps}, i) => (
             <li className="menu__list-item" key={i}>
               <NavLink
+                activeClassName="menu__link--active"
                 className={navLinkClassNames(childItemClassName)}
                 {...linkItemInnerProps}
                 onClick={props.onClick}
diff --git a/yarn.lock b/yarn.lock
index b49c66216a..f4f4ce60c2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8710,10 +8710,10 @@ infer-owner@^1.0.3, infer-owner@^1.0.4:
   resolved "https://registry.yarnpkg.com/infer-owner/-/infer-owner-1.0.4.tgz#c4cefcaa8e51051c2a40ba2ce8a3d27295af9467"
   integrity sha512-IClj+Xz94+d7irH5qRyfJonOdfTzuDaifE6ZPWfx0N0+/ATZCbuTPq2prFl526urkQd90WyUKIh1DfBQ2hMz9A==
 
-infima@0.2.0-alpha.6:
-  version "0.2.0-alpha.6"
-  resolved "https://registry.yarnpkg.com/infima/-/infima-0.2.0-alpha.6.tgz#69233fc055a7e9eb08fd70e1497ff8e2a68dd928"
-  integrity sha512-5Oin586QeBa5VdP8xpPuHB/BDg1D66+B5bFG67XPqKV8mD0hwKt2LJFYqoSJKGPBccxGBQpHEOFUd2sUSdhdGA==
+infima@0.2.0-alpha.9:
+  version "0.2.0-alpha.9"
+  resolved "https://registry.yarnpkg.com/infima/-/infima-0.2.0-alpha.9.tgz#2eea70b1571c8f55847e3f305ebd10814d2d09cf"
+  integrity sha512-EXsGm6WhsabOangUkHyTx1qfKJdHF3Q9na/hJe387ytOkWu/phwjsA7T/C6b2KeRTdZl/DO1tFZsFc2+Qnif7A==
 
 inflight@^1.0.4:
   version "1.0.6"