diff --git a/modules/email/mu4e/README.org b/modules/email/mu4e/README.org
index ed8134ae9..6fbcca032 100644
--- a/modules/email/mu4e/README.org
+++ b/modules/email/mu4e/README.org
@@ -74,12 +74,12 @@ environment.systemPackages = with pkgs; [
 
 * Features
 + Tidied mu4e headers view, with flags from =all-the-icons=
-+ Consistent colouring of reply depths (across compose and gnus modes)
++ Consistent coloring of reply depths (across compose and gnus modes)
 + Prettified =mu4e:main= view
 + Cooperative locking of the =mu= process. Another Emacs instance may request
   access, or grab the lock when it's available.
 + =org-msg= integration with =+org=, which can be toggled per-message, with revamped style and
-  an accent colour
+  an accent color
 + Gmail integrations with the =+gmail= flag
 + Email notifications with =mu4e-alert=, and (on Linux) a customised notification style
 
@@ -174,8 +174,8 @@ To disable ~org-msg-mode~ by default, simply
 To toggle org-msg for a single message, just apply the universal argument to the
 compose or reply command (=SPC u= with ~evil~, =C-u= otherwise).
 
-The accent colour that Doom uses can be customised by setting
-~+org-msg-accent-color~ to a CSS colour string.
+The accent color that Doom uses can be customised by setting
+~+org-msg-accent-color~ to a CSS color string.
 
 *** Disabling
 If you don't like OrgMsg, simply add
diff --git a/modules/email/mu4e/autoload/email.el b/modules/email/mu4e/autoload/email.el
index ffed628e0..4a91ef63d 100644
--- a/modules/email/mu4e/autoload/email.el
+++ b/modules/email/mu4e/autoload/email.el
@@ -94,13 +94,13 @@ will also be the width of all other printable characters."
       (car (window-text-pixel-size)))))
 
 ;;;###autoload
-(cl-defun +mu4e-normalised-icon (name &key set colour height v-adjust)
+(cl-defun +mu4e-normalised-icon (name &key set color height v-adjust)
   "Convert :icon declaration to icon"
   (let* ((icon-set (intern (concat "all-the-icons-" (or set "faicon"))))
          (v-adjust (or v-adjust 0.02))
          (height (or height 0.8))
-         (icon (if colour
-                   (apply icon-set `(,name :face ,(intern (concat "all-the-icons-" colour)) :height ,height :v-adjust ,v-adjust))
+         (icon (if color
+                   (apply icon-set `(,name :face ,(intern (concat "all-the-icons-" color)) :height ,height :v-adjust ,v-adjust))
                  (apply icon-set `(,name  :height ,height :v-adjust ,v-adjust))))
          (icon-width (+mu4e--get-string-width icon))
          (space-width (+mu4e--get-string-width " "))
@@ -116,19 +116,19 @@ will also be the width of all other printable characters."
         mu4e-headers-new-mark        (cons "N" (+mu4e-normalised-icon "sync" :set "material" :height 0.8 :v-adjust -0.10))
         mu4e-headers-passed-mark     (cons "P" (+mu4e-normalised-icon "arrow-right"))
         mu4e-headers-replied-mark    (cons "R" (+mu4e-normalised-icon "arrow-right"))
-        mu4e-headers-seen-mark       (cons "S" "") ;(+mu4e-normalised-icon "eye" :height 0.6 :v-adjust 0.07 :colour "dsilver"))
+        mu4e-headers-seen-mark       (cons "S" "") ;(+mu4e-normalised-icon "eye" :height 0.6 :v-adjust 0.07 :color "dsilver"))
         mu4e-headers-trashed-mark    (cons "T" (+mu4e-normalised-icon "trash"))
-        mu4e-headers-attach-mark     (cons "a" (+mu4e-normalised-icon "file-text-o" :colour "silver"))
+        mu4e-headers-attach-mark     (cons "a" (+mu4e-normalised-icon "file-text-o" :color "silver"))
         mu4e-headers-encrypted-mark  (cons "x" (+mu4e-normalised-icon "lock"))
-        mu4e-headers-signed-mark     (cons "s" (+mu4e-normalised-icon "certificate" :height 0.7 :colour "dpurple"))
+        mu4e-headers-signed-mark     (cons "s" (+mu4e-normalised-icon "certificate" :height 0.7 :color "dpurple"))
         mu4e-headers-unread-mark     (cons "u" (+mu4e-normalised-icon "eye-slash" :v-adjust 0.05))))
 
 ;;;###autoload
 (defun +mu4e-header-colorize (str)
   (let* ((str-sum (apply #'+ (mapcar (lambda (c) (% c 3)) str)))
-         (colour (nth (% str-sum (length mu4e-header-colorized-faces))
-                      mu4e-header-colorized-faces)))
-    (put-text-property 0 (length str) 'face colour str)
+         (color (nth (% str-sum (length +mu4e-header-colorized-faces))
+                     +mu4e-header-colorized-faces)))
+    (put-text-property 0 (length str) 'face color str)
     str))
 
 ;; Adding emails to the agenda
diff --git a/modules/email/mu4e/config.el b/modules/email/mu4e/config.el
index d0b6c1dbd..738a188c3 100644
--- a/modules/email/mu4e/config.el
+++ b/modules/email/mu4e/config.el
@@ -71,7 +71,7 @@
   (setq mail-user-agent 'mu4e-user-agent
         message-mail-user-agent 'mu4e-user-agent)
 
-  ;; Make reply colouring consistant, and striped for readability
+  ;; Make reply coloring consistant, and striped for readability
   (custom-set-faces!
     '(gnus-cite-2 :foreground nil :inherit gnus-cite-10)
     '(gnus-cite-3 :foreground nil :inherit gnus-cite-7)