Hi,
I just naively modified org-fontify-drawers to fontify org babel inline src block. The result looks reasonable to me. I put these two functions in a src block in my org file and executed it, then refreshed display with M-x org-mode.
(defun org-fontify-inline-src-block (limit)
"Fontify inline source block."
(when (re-search-forward org-babel-inline-src-block-regexp limit t)
(add-text-properties
(match-beginning 1) (match-end 0)
'(font-lock-fontified t face (t (:foreground "#008ED1" :background "#FFFFEA"))))
(org-remove-flyspell-overlays-in (match-beginning 0) (match-end 0))
t))
(defun org-set-font-lock-defaults ()
......
;; Drawers
'(org-fontify-drawers)
;; Inline source block
'(org-fontify-inline-src-block)
Cheers,
Bowen