diff --git a/css/leptonContent.css b/css/leptonContent.css
index e94b872..01b16b4 100644
--- a/css/leptonContent.css
+++ b/css/leptonContent.css
@@ -840,6 +840,7 @@
       .AddonTitle a,
       .TooltipMenu-opener,
       .LanguageTools .Card-contents a,
+      .Button--primary,
       .blog-entry-read-more-link,
       .blogpost-nav-next.blogpost-nav-no-prev:hover p,
       .blogpost-content-wrapper p a,
@@ -881,12 +882,14 @@
       }
 
       /* Background */
-      .Button--action {
+      .Button--action,
+      .DevHub-Navigation ul li.DevHub-Navigation-Register .Button {
         color: var(--in-content-primary-button-text-color) !important;
         background: var(--in-content-primary-button-background) !important;
       }
 
       .Select,
+      .Button--primary,
       .Button--neutral,
       .Button--neutral:link,
       .Notice-button,
@@ -894,6 +897,7 @@
         background-color: var(--in-content-button-background) !important;
       }
 
+      .Button--primary:hover,
       .Button--neutral.Button--micro:not(.Button--disabled):hover,
       .Button--neutral:not(.Button--disabled):hover,
       .Notice-button:hover {
@@ -901,7 +905,8 @@
       }
 
       .Button--action.Button--micro:not(.Button--disabled):hover,
-      .Button--action:not(.Button--disabled):hover {
+      .Button--action:not(.Button--disabled):hover,
+      .DevHub-Navigation ul li.DevHub-Navigation-Register .Button:hover {
         background: var(--in-content-primary-button-background-hover) !important;
       }
 
@@ -1010,6 +1015,12 @@
       }
 
       /* /developers/ */
+      .DevHub-Navigation-Logo > .Logo {
+        -moz-context-properties: fill !important;
+        fill: var(--in-content-primary-button-background) !important;
+        background-image: url("../icons/addons-logo.svg") !important;
+      }
+
       .DevHub-Navigation,
       .DevHub-submit-addon,
       .DevHub-get-involved,
@@ -1032,10 +1043,17 @@
         color: var(--in-content-page-color) !important;
       }
 
+      .DevHub-content-copy p,
+      .DevHub-callout-box p {
+        color: var(--in-content-deemphasized-text) !important;
+      }
+
       .DevHub-Banner a,
       .DevHub-Footer a,
       .DevHub-MyAddons-list a,
-      .DevHub-MyAddons-item-buttons-all {
+      .DevHub-MyAddons-item-buttons-all,
+      .DevHub-content-copy a,
+      .DevHub-callout-box a {
         color: var(--in-content-link-color) !important;
       }
     }
diff --git a/icons/addons-logo.svg b/icons/addons-logo.svg
new file mode 100644
index 0000000..4c643af
--- /dev/null
+++ b/icons/addons-logo.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" height="581" width="598"><path fill="context-fill" d="M119.31 4.67c8.3 3.84 14.62 10.74 20.12 17.85 5.79 7.6 10.5 16.72 10.18 26.52.11 13.73-10.19 25.95-6.85 39.91 2.4 8.15 7.85 15.85 15.61 19.64 11.61 4.99 24.78.17 34.65-6.5 10.88-10.13 21.32-20.74 32.01-31.08 16.23-16.11 54.77-54.33 58.39-56.59 5.777-3.607 10.617-3.561 15.688-3.561 5.07 0 10.489 1.121 14.199 4.201 30.528 25.345 59.773 55.87 88.113 83.51 5.29 5.77 12.78 8.94 20.19 11.03 7.94 2.2 17.16 1.16 23.51-4.43 6.81-6 11.82-14.96 10.96-24.27-1.02-11.3-7.93-21.37-7.46-32.91.16-12.86 8.13-23.84 16.48-32.93C473.33 5.74 485.61.39 498 .18c16.19-.77 32.09 4.22 46.46 11.32 11.51 5.83 22.6 13.09 31.08 22.95 10.46 12.6 17.52 27.96 20.76 43.99 2.62 13.96 2.29 29.31-5.07 41.86-7.41 12.18-20.15 21.02-34.17 23.68-9.29 1.76-18.79.98-28.09-.23-4.64-.54-9.3-1.47-13.98-1.02-8.24 1.08-16.57 4.97-21.21 12.1-4.93 7.56-4.99 17.38-2.11 25.72 1.95 5.45 4.64 10.83 8.85 14.9 16.13 14.87 32.03 29.98 47.53 45.5 12.29 12.39 24.61 24.82 35.42 38.55 2.79 4.04 6.54 8.24 6.07 13.5 0 4.57-1.32 9.07-3.57 13.03-2.35 4.42-6.42 7.5-9.72 11.16-15.31 16.04-30.68 32.04-46.02 48.05-2.65 2.56-4.71 6.07-8.37 7.28-9.29 3.52-19.45 5.39-29.34 3.73-12.15-2.09-22.31-12.2-25.01-24.14-2.8-14.08 2.99-27.98 1.99-42.09-.58-9.88-5.33-19.27-12.48-26.04-7.34-7.39-17.74-11.02-27.98-11.66-14.51-.81-28.89 3.42-41.71 9.96-21.32 10.99-38.43 29.54-48.59 51.19-5.98 13.3-9.53 28.45-6.26 42.94 3.19 15.23 14.77 28.7 29.78 33.24 9.59 3.04 19.78 2.23 29.67 1.83 10.77-.65 22.3-2.64 32.48 2.04 11.06 5.85 16.38 19.39 14.36 31.45-.99 4.96-1.62 10.64-5.61 14.2-34.92 35.7-69.81 71.44-104.69 107.18-7.25 5.84-15.59 10.57-24.56 13.18-7.08 2.2-14.36-.68-20.61-3.93-4.79-2.63-9.48-5.56-13.53-9.26-35.07-35.96-70.22-71.85-105.3-107.8-2.43-2.2-3.14-5.5-4-8.51-2.71-9.88-1.58-21.32 5.02-29.46 4.71-6.5 12.68-9.67 20.52-9.93 15.25-.57 30.61 3.04 45.77.11 14.95-2.88 27.45-14.56 32.42-28.8 3.97-11.28 3.36-23.7.18-35.09-5.79-20.27-18.43-38.25-34.37-51.87-14.47-11.94-32.15-20.6-50.96-22.49-12.12-1.25-25.08 1.11-34.83 8.76-8.7 6.98-14.85 17.47-15.5 28.72-1 13.11 4.04 25.94 2.48 39.03-1.48 13.3-12.41 25.09-25.66 27.28-9.03 1.47-18.29.01-26.88-2.93-1.85-.68-3.92-1.13-5.34-2.59-18.68-19.38-37.22-38.9-55.89-58.28-6.08-5.47-9.42-13.85-8.67-22 .81-4.38 3.81-7.93 6.33-11.47 14.03-17.49 30.15-33.14 46.03-48.93 11.71-11.26 23.39-22.55 35.38-33.51 5.95-5.26 9.45-12.81 11.27-20.42 1.61-7.47.65-15.79-3.86-22.11-6.44-8.66-18.03-12.71-28.55-11.07-12.9 1.67-26.32 3.65-39.03-.18-15.93-4.74-29.9-17.55-34-33.93-3.99-15.42-1.31-31.81 4.25-46.5 3.61-9.65 8.77-18.72 15.12-26.83 8.27-9.89 19.09-17.31 30.46-23.21 11-5.74 22.9-9.9 35.21-11.64C98.1-.6 109.42-.08 119.31 4.67z" fill-rule="evenodd"/></svg>
diff --git a/src/contents/dark_mode/_addons_org.scss b/src/contents/dark_mode/_addons_org.scss
index 6f48de5..f200eef 100644
--- a/src/contents/dark_mode/_addons_org.scss
+++ b/src/contents/dark_mode/_addons_org.scss
@@ -59,6 +59,7 @@
   .AddonTitle a,
   .TooltipMenu-opener,
   .LanguageTools .Card-contents a,
+  .Button--primary,
   .blog-entry-read-more-link,
   .blogpost-nav-next.blogpost-nav-no-prev:hover p,
   .blogpost-content-wrapper p a,
@@ -98,24 +99,28 @@
   }
 
   /* Background */
-  .Button--action {
+  .Button--action,
+  .DevHub-Navigation ul li.DevHub-Navigation-Register .Button {
     color: var(--in-content-primary-button-text-color) !important;
     background: var(--in-content-primary-button-background) !important;
   }
   .Select,
+  .Button--primary,
   .Button--neutral,
   .Button--neutral:link,
   .Notice-button,
   .AMInstallButton .AMInstallButton-loading-button {
     background-color: var(--in-content-button-background) !important;
   }
+  .Button--primary:hover,
   .Button--neutral.Button--micro:not(.Button--disabled):hover,
   .Button--neutral:not(.Button--disabled):hover,
   .Notice-button:hover {
     background: var(--in-content-button-background-hover) !important;
   }
   .Button--action.Button--micro:not(.Button--disabled):hover,
-  .Button--action:not(.Button--disabled):hover {
+  .Button--action:not(.Button--disabled):hover,
+  .DevHub-Navigation ul li.DevHub-Navigation-Register .Button:hover {
     background: var(--in-content-primary-button-background-hover) !important;
   }
   .ShowMoreCard-contents::after {
@@ -213,6 +218,12 @@
   }
 
   /* /developers/ */
+  .DevHub-Navigation-Logo > .Logo {
+    -moz-context-properties: fill !important;
+    fill: var(--in-content-primary-button-background) !important;
+    background-image: url("../icons/addons-logo.svg") !important;
+  }
+
   .DevHub-Navigation,
   .DevHub-submit-addon,
   .DevHub-get-involved,
@@ -233,10 +244,16 @@
   .DevHub-content-copy h2 {
     color: var(--in-content-page-color) !important;
   }
+  .DevHub-content-copy p,
+  .DevHub-callout-box p {
+    color: var(--in-content-deemphasized-text) !important;
+  }
   .DevHub-Banner a,
   .DevHub-Footer a,
   .DevHub-MyAddons-list a,
-  .DevHub-MyAddons-item-buttons-all {
+  .DevHub-MyAddons-item-buttons-all,
+  .DevHub-content-copy a,
+  .DevHub-callout-box a {
     color: var(--in-content-link-color) !important;
   }
 }