Add semantic colour mapping for "date range"

modus-operandi-deuteranopia-theme.el

@@ -278,6 +278,7 @@ standard).")
       (date-event fg-alt)
       (date-holiday yellow-warmer)
       (date-now blue-faint)
+      (date-range fg-alt)
       (date-scheduled yellow-cooler)
       (date-weekday cyan)
       (date-weekend yellow-faint)

modus-operandi-theme.el

@@ -276,6 +276,7 @@ which corresponds to a minimum contrast in relative luminance of
       (date-event fg-alt)
       (date-holiday magenta)
       (date-now fg-main)
+      (date-range fg-alt)
       (date-scheduled yellow-warmer)
       (date-weekday cyan)
       (date-weekend red-faint)

modus-operandi-tinted-theme.el

@@ -275,6 +275,7 @@ which corresponds to a minimum contrast in relative luminance of
       (date-event fg-alt)
       (date-holiday magenta)
       (date-now fg-main)
+      (date-range fg-alt)
       (date-scheduled yellow-warmer)
       (date-weekday cyan)
       (date-weekend red-faint)

modus-vivendi-deuteranopia-theme.el

@@ -277,6 +277,7 @@ standard).")
       (date-event fg-alt)
       (date-holiday yellow-warmer)
       (date-now blue-faint)
+      (date-range fg-alt)
       (date-scheduled yellow-cooler)
       (date-weekday cyan)
       (date-weekend yellow-faint)

modus-vivendi-theme.el

@@ -275,6 +275,7 @@ which corresponds to a minimum contrast in relative luminance of
       (date-event fg-alt)
       (date-holiday magenta)
       (date-now fg-main)
+      (date-range fg-alt)
       (date-scheduled yellow-warmer)
       (date-weekday cyan)
       (date-weekend red-faint)

modus-vivendi-tinted-theme.el

@@ -275,6 +275,7 @@ which corresponds to a minimum contrast in relative luminance of
       (date-event fg-alt)
       (date-holiday magenta)
       (date-now fg-main)
+      (date-range fg-alt)
       (date-scheduled yellow-warmer)
       (date-weekday cyan)
       (date-weekend red-faint)