Backport of crash fix when previewing some files with colors.
https://forums.gentoo.org/viewtopic-t-1170286.html
https://github.com/ranger/ranger/commit/82eef55b1664
https://github.com/ranger/ranger/commit/642d594b8328 (also needed)
--- a/ranger/gui/color.py
+++ b/ranger/gui/color.py
@@ -20,5 +20,6 @@
 DEFAULT_FOREGROUND = curses.COLOR_WHITE
 DEFAULT_BACKGROUND = curses.COLOR_BLACK
-COLOR_PAIRS = {10: 0}
+# Color pair 0 is wired to white on black and cannot be changed
+COLOR_PAIRS = {(DEFAULT_FOREGROUND, DEFAULT_BACKGROUND): 0}
 
 
@@ -31,4 +32,10 @@
         try:
             curses.init_pair(size, fg, bg)
+        except ValueError:
+            # We're trying to add more pairs than the terminal can store,
+            # approximating to the closest color pair that's already stored
+            # would be cool but the easier solution is to just fall back to the
+            # default fore and background colors, pair 0
+            COLOR_PAIRS[key] = 0
         except curses.error:
             # If curses.use_default_colors() failed during the initialization