(setq
 theming-modifications
 '(
	 (spacemacs-dark
		(whitespace-space :background unspecified
											:foreground "gray30")
		(whitespace-space-after-tab :foreground "gray30")
		(whitespace-tab :background unspecified)
		(whitespace-newline :foreground "gray30")
		(whitespace-line :background unspecified)
		(whitespace-indentation :foreground "gray30")
		(highlight-doxygen-comment :slant italic)
		)
	 (noctilux
		(whitespace-space :background unspecified
											:foreground "gray30")
		(whitespace-space-after-tab :foreground "gray30")
		(whitespace-tab :background unspecified
										:foreground "gray30")
		(whitespace-newline :foreground "gray30")
		(whitespace-line :background unspecified)
		(whitespace-indentation :foreground "gray30")
		(header-line :background unspecified
								 :box "gray80"
								 :inverse-video nil)
		(highlight-doxygen-comment :slant italic)
		)
	 (occidental
		(highlight :background "#9EC4EB") ;; The default is too bright
		(whitespace-space :background unspecified
											:foreground "gray70")
		(whitespace-space-after-tab :foreground "gray70")
		(whitespace-tab :background unspecified
										:foreground "gray70")
		(whitespace-newline :foreground "gray70")
		(whitespace-line :background unspecified)
		(whitespace-indentation :foreground "gray70")
		(header-line :background unspecified
								 :box "gray20"
								 :inverse-video nil)
		(highlight-doxygen-comment :slant italic)
		)))

(spacemacs/update-theme)