add colored string for rst export

lisp/my/my.el

@@ -549,6 +549,23 @@ Example usage
                        r g b
                        (or description color)))
            (format "No Color RGB for %s" color))))
+      ;; text :raw-html:`<span style="color:red">foo</span>` baz
+      ;; need in Sphinx conf.py rst_prolog = """
+      ;; .. role:: raw-html(raw)
+      ;;    :format: html
+      ;; """
+      ((eq backend 'rst)
+       (let ((rgb (color-name-to-rgb color))
+             r g b)
+         (if rgb
+             (progn
+               (setq r (truncate (* 255 (nth 0 rgb))))
+               (setq g (truncate (* 255 (nth 1 rgb))))
+               (setq b (truncate (* 255 (nth 2 rgb))))
+               (format ":raw-html:`<span style=\"color: rgb(%s,%s,%s)\">%s</span>`"
+                       r g b
+                       (or description color)))
+           (format "No Color RGB for %s" color))))
       ((eq backend 'latex)
        (let ((rgb (color-name-to-rgb color)))
          (if rgb