diff --git a/pre_commit/main.py b/pre_commit/main.py
index 7092a5a8..58aeea32 100644
--- a/pre_commit/main.py
+++ b/pre_commit/main.py
@@ -79,7 +79,8 @@ def main(argv=None):
     run_parser.add_argument('hook', nargs='?', help='A single hook-id to run')
     run_parser.add_argument(
         '--color', default='auto', type=color.use_color,
-        help='Whether to use color in output.  Defaults to `auto`',
+        help='Whether to use color in output.  Choices are `always`, `never`'
+        ', or `auto`.  Defaults to `auto`.',
     )
     run_parser.add_argument(
         '--no-stash', default=False, action='store_true',
@@ -90,20 +91,20 @@ def main(argv=None):
     )
     run_parser.add_argument(
         '--origin', '-o',
-        help='The origin branch\'s commit_id when using `git push`',
+        help='The origin branch\'s commit_id when using `git push`.',
     )
     run_parser.add_argument(
         '--source', '-s',
-        help='The remote branch\'s commit_id when using `git push`',
+        help='The remote branch\'s commit_id when using `git push`.',
     )
     run_parser.add_argument(
         '--allow-unstaged-config', default=False, action='store_true',
-        help='Allow an unstaged config to be present.  Note that this will'
-        'be stashed before parsing unless --no-stash is specified'
+        help='Allow an unstaged config to be present.  Note that this will '
+        'be stashed before parsing unless --no-stash is specified.'
     )
     run_parser.add_argument(
         '--hook-stage', choices=('commit', 'push'), default='commit',
-        help='The stage during which the hook is fired e.g. commit or push',
+        help='The stage during which the hook is fired e.g. commit or push.',
     )
     run_mutex_group = run_parser.add_mutually_exclusive_group(required=False)
     run_mutex_group.add_argument(