Change the color of sublime text trailing spaces. Requires trailing spaces extension.

Solarized (Dark).tmTheme

<dict>
  <key>name</key>
  <string>Invalid - Illegal</string>
  <key>scope</key>
  <string>invalid.illegal</string>
  <key>settings</key>
  <dict>
    <key>background</key>
    <string>#333333</string>
    <key>fontStyle</key>
    <string></string>
    <key>foreground</key>
    <string>#F9F2CE</string>
  </dict>
 </dict>

trailing_spaces.sublime-settings

{
    "trailing_spaces_highlight_color": "invalid.illegal"
}