dstat の darkgray が見づらかったので...

--- dstat.back  2015-01-23 14:23:26.911928403 +0900
+++ dstat   2015-01-23 14:24:21.237011050 +0900
@@ -1608,11 +1608,11 @@
             'error': ansi['white'] + ansi['redbg'],
             'roundtrip': ansi['darkblue'],
             'debug': ansi['darkred'],
-            'input': ansi['darkgray'],
+            'input': ansi['white'],
             'text_lo': ansi['gray'],
-            'text_hi': ansi['darkgray'],
-            'unit_lo': ansi['darkgray'],
-            'unit_hi': ansi['darkgray'],
+            'text_hi': ansi['white'],
+            'unit_lo': ansi['white'],
+            'unit_hi': ansi['white'],
             'colors_lo': (ansi['red'], ansi['yellow'], ansi['green'], ansi['blue'],
                           ansi['cyan'], ansi['white'], ansi['darkred'], ansi['darkgreen']),
             'colors_hi': (ansi['darkred'], ansi['darkyellow'], ansi['darkgreen'], ansi['darkblue'],