diff --git a/src/registrar/assets/sass/_theme/_uswds-theme-custom-styles.scss b/src/registrar/assets/sass/_theme/_uswds-theme-custom-styles.scss
index f1146c14e..135683df4 100644
--- a/src/registrar/assets/sass/_theme/_uswds-theme-custom-styles.scss
+++ b/src/registrar/assets/sass/_theme/_uswds-theme-custom-styles.scss
@@ -196,6 +196,17 @@ a.breadcrumb__back {
   margin-bottom: units(0.5);
 }
 
+.dotgov-button--green {
+  background-color: color('success-dark');
+
+  &:hover {
+    background-color: color('success-darker');
+  }
+
+  &:active {
+    background-color: color('green-80v');
+  }
+}
 
 /** ---- DASHBOARD ---- */
 
diff --git a/src/registrar/assets/sass/_theme/_uswds-theme.scss b/src/registrar/assets/sass/_theme/_uswds-theme.scss
index ee514518a..ba076d845 100644
--- a/src/registrar/assets/sass/_theme/_uswds-theme.scss
+++ b/src/registrar/assets/sass/_theme/_uswds-theme.scss
@@ -81,6 +81,7 @@ in the form $setting: value,
   ------------------------------
   ## Primary color
   ----------------------------*/ 
+  $theme-color-primary-darkest: $dhs-blue-80,
   $theme-color-primary-darker: $dhs-blue-70,
   $theme-color-primary-dark: $dhs-blue-60,
   $theme-color-primary: $dhs-blue,
diff --git a/src/registrar/templates/application_form.html b/src/registrar/templates/application_form.html
index d1f9598b3..3697235f1 100644
--- a/src/registrar/templates/application_form.html
+++ b/src/registrar/templates/application_form.html
@@ -69,7 +69,7 @@
             {% else %}
             <button
               type="submit"
-              class="usa-button"
+              class="usa-button usa-button--big dotgov-button--green"
             >Submit your domain request</button>
             {% endif %}
           </div>