Color module, base color replaced with null text?

My scheme is defined as:

  'schemes' => array(
    '#1f6eb3,#2a5c8a,#b8d6f2,#999999,#1f6eb2' => t('generic (default)'),
  ),

My css that color module affects:

#sidebar-left .menu-name-primary-links a{color: #1f6eb3}
#sidebar-left .menu-name-primary-links a{color: #3f9cf2}

The result after another scheme or new custom scheme is applied:

#sidebar-left .menu-name-primary-links a{color: }
#sidebar-left .menu-name-primary-links a{color: #3e9bf2}